ariane user guide

8/9/2019 Ariane User Guide

1/370

Ariane7

USER GUIDE

June 2011

This document has been prepared for the users of Ariane7 c Bureau Veritas and deals withthe use of the software.

Research DepartmentBUREAU VERITAS

92571 Neuilly-sur-Seine CedexTel: (33-01) 55 24 74 67Fax: (33-01) 55 24 70 26

Ariane7 cBV (1991-2010) is distributed by Bureau Veritas.


2/370

First Printing, December 2007Revised, June 2011

cBureau VeritasContact: Cdric Brun, Damien Coache, Yann Giorgiutti, Romain Anneemail: [email protected]


3/370

Contents

Introduction 1

I Getting started 5

1 Minimum requirements 7

2 Installation procedure 12.1 Ariane7 setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.2 Ariane7 launching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3 License setting 13.1 FlexLm USB Dongle . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.2 Nodelock License configuration . . . . . . . . . . . . . . . . . . . . . 23.3 Server License configuration . . . . . . . . . . . . . . . . . . . . . . . 2

4 Update projects to the Ariane7 format 1

II Inputs 3

5 Main interface Description 15.1 Menu bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25.1.1 File menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25.1.2 Configuration menu. . . . . . . . . . . . . . . . . . . . . . . . 35.1.3 Tools menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145.1.4 Help menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.2 Tool bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195.3 Automatic saving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205.4 Creating a new project . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.4.1 Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.4.2 Status bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

-Bureau Veritas, Marine Department-


4/370

0-iv CONTENTS

5.4.3 Information log . . . . . . . . . . . . . . . . . . . . . . . . . . 265.5 Ariane7 axis systems . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.5.1 Global axis system . . . . . . . . . . . . . . . . . . . . . . . . 275.5.2 Local axis system . . . . . . . . . . . . . . . . . . . . . . . . . 28

6 Vessels page 16.1 Vessel choice. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.2 Description of the vessel geometry. . . . . . . . . . . . . . . . . . . . 3

6.2.1 Three dimensions visualization. . . . . . . . . . . . . . . . . . 36.2.2 Definition of a vessel mesh . . . . . . . . . . . . . . . . . . . . 4

6.2.3 Vessel main particulars definition . . . . . . . . . . . . . . . . 66.2.4 Turrets definition . . . . . . . . . . . . . . . . . . . . . . . . . 66.2.5 Fairleads definition . . . . . . . . . . . . . . . . . . . . . . . . 86.2.6 Control points definition . . . . . . . . . . . . . . . . . . . . . 106.2.7 Fenders attach points definition . . . . . . . . . . . . . . . . . 116.2.8 Thrusters definition. . . . . . . . . . . . . . . . . . . . . . . . 12

6.3 Loading Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136.3.1 Vessels data. . . . . . . . . . . . . . . . . . . . . . . . . . . . 146.3.2 Added mass . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156.3.3 Damping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6.3.4 Response Amplitude Operators . . . . . . . . . . . . . . . . . 226.3.5 Quadratic Transfer Functions . . . . . . . . . . . . . . . . . . 256.3.6 Complete Quadratic Transfer Functions. . . . . . . . . . . . . 316.3.7 Cross waves full QTF. . . . . . . . . . . . . . . . . . . . . . . 346.3.8 Wind and current coefficients/forces . . . . . . . . . . . . . . 356.3.9 External loads. . . . . . . . . . . . . . . . . . . . . . . . . . . 426.3.10 First order loads . . . . . . . . . . . . . . . . . . . . . . . . . 446.3.11 Imposed motions . . . . . . . . . . . . . . . . . . . . . . . . . 446.3.12 Symmetrise inputs . . . . . . . . . . . . . . . . . . . . . . . . 476.3.13 Load a complete hydrodynamic data file . . . . . . . . . . . . 47

6.3.14 Export hydrodynamic data file . . . . . . . . . . . . . . . . . 476.3.15 Add loading cases to a vessel. . . . . . . . . . . . . . . . . . . 48

6.4 Export/import vessels . . . . . . . . . . . . . . . . . . . . . . . . . . 49

7 Lines store page 17.1 Segmented line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

7.1.1 Creating a line . . . . . . . . . . . . . . . . . . . . . . . . . . 37.1.2 Defining the segments length. . . . . . . . . . . . . . . . . . . 47.1.3 Defining the segment type . . . . . . . . . . . . . . . . . . . . 47.1.4 Defining the segment properties . . . . . . . . . . . . . . . . . 5

7.1.5 Modifying the line . . . . . . . . . . . . . . . . . . . . . . . . 11

-Ariane7, User Guide-


5/370

CONTENTS 0-v

7.2 Tabulated Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7.2.1 Creating a line . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7.2.2 Point properties . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7.3 Fenders characteristic. . . . . . . . . . . . . . . . . . . . . . . . . . . 15

7.4 Export/import a line store . . . . . . . . . . . . . . . . . . . . . . . . 17

7.5 Lines summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

8 Environment store page 1

8.1 Create an environment . . . . . . . . . . . . . . . . . . . . . . . . . . 1

8.2 Environment definition . . . . . . . . . . . . . . . . . . . . . . . . . . 58.2.1 Wave definition . . . . . . . . . . . . . . . . . . . . . . . . . . 5

8.2.2 Wind definition . . . . . . . . . . . . . . . . . . . . . . . . . . 10

8.2.3 Current definition. . . . . . . . . . . . . . . . . . . . . . . . . 13

8.2.4 Graph zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

8.3 Creating an environment batch file . . . . . . . . . . . . . . . . . . . 14

8.3.1 Easy generation of environment batch files . . . . . . . . . . . 14

8.3.2 Environment batch file example . . . . . . . . . . . . . . . . . 16

8.3.3 Keywords of an environment batch file . . . . . . . . . . . . . 16

8.3.4 Order of the spectrum parameters . . . . . . . . . . . . . . . . 188.4 Export/import an environment store . . . . . . . . . . . . . . . . . . 22

9 Mooring system 1

9.1 Site. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

9.1.1 Mooring zone . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

9.1.2 Plane seabed definition . . . . . . . . . . . . . . . . . . . . . . 1

9.2 Vessels settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

9.3 Anchors settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

9.3.1 Anchor creation . . . . . . . . . . . . . . . . . . . . . . . . . . 5

9.3.2 Anchor modification . . . . . . . . . . . . . . . . . . . . . . . 89.4 Lines settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

9.4.1 Create a mooring line. . . . . . . . . . . . . . . . . . . . . . . 9

9.4.2 Lines modification . . . . . . . . . . . . . . . . . . . . . . . . 13

9.5 Ilines generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

9.6 Fender settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

9.7 Mooring System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

9.7.1 Text summary. . . . . . . . . . . . . . . . . . . . . . . . . . . 19

9.7.2 Text or Excel summary. . . . . . . . . . . . . . . . . . . . . . 20

9.7.3 Export Diodore line characteristics . . . . . . . . . . . . . . . 20



6/370

0-vi CONTENTS

10 Line setup 110.1 Line profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

10.1.1 Line profile calculation . . . . . . . . . . . . . . . . . . . . . . 210.1.2 Line profile display . . . . . . . . . . . . . . . . . . . . . . . . 310.1.3 Line characteristic display . . . . . . . . . . . . . . . . . . . . 710.1.4 Line profile/characteristic dialog. . . . . . . . . . . . . . . . . 8

10.2 Buoys and sinkers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1010.2.1 Buoys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1010.2.2 Sinkers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

10.3 Seabed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1410.4 Line control points . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

III Calculation 17

11 Static analysis 111.1 Setup initial position (SINGLE) . . . . . . . . . . . . . . . . . . . . . 111.2 Rig move (SINGLE) . . . . . . . . . . . . . . . . . . . . . . . . . . . 611.3 Equilibrium analysis (SINGLE) . . . . . . . . . . . . . . . . . . . . . 9

11.3.1 State of the lines . . . . . . . . . . . . . . . . . . . . . . . . . 10

11.3.2 Equilibrium position under mooring loads only. . . . . . . . . 1011.3.3 Equilibrium position under environmental conditions . . . . . 1111.3.4 Equilibrium position under the action of thrusters . . . . . . . 1311.3.5 Equilibrium position under the action of external loads . . . . 15

11.4 Imposed offset (BATCH) . . . . . . . . . . . . . . . . . . . . . . . . . 1811.5 Equilibrium Analysis (BATCH) . . . . . . . . . . . . . . . . . . . . . 22

11.5.1 With constant loads . . . . . . . . . . . . . . . . . . . . . . . 2211.5.2 With environmental loads . . . . . . . . . . . . . . . . . . . . 24

11.6 Stiffness matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

12 Time domain simulation 112.1 Single time domain simulation . . . . . . . . . . . . . . . . . . . . . . 1

12.1.1 Lines activity . . . . . . . . . . . . . . . . . . . . . . . . . . . 212.1.2 Simulation parameters . . . . . . . . . . . . . . . . . . . . . . 312.1.3 Environmental loads . . . . . . . . . . . . . . . . . . . . . . . 412.1.4 Calculation options . . . . . . . . . . . . . . . . . . . . . . . . 612.1.5 Output options . . . . . . . . . . . . . . . . . . . . . . . . . . 1712.1.6 TDS simulation . . . . . . . . . . . . . . . . . . . . . . . . . . 20

12.2 Batch time domain analyses . . . . . . . . . . . . . . . . . . . . . . . 2312.2.1 Create a batch analysis. . . . . . . . . . . . . . . . . . . . . . 24

12.2.2 Setup batch analysis . . . . . . . . . . . . . . . . . . . . . . . 27



7/370

CONTENTS 0-vii

12.2.3 Batch analysis parameters . . . . . . . . . . . . . . . . . . . . 27

12.2.4 Calculation options . . . . . . . . . . . . . . . . . . . . . . . . 2812.2.5 Output options . . . . . . . . . . . . . . . . . . . . . . . . . . 32

12.2.6 Batch time domain calculations . . . . . . . . . . . . . . . . . 3312.2.7 Multiple batch analyses . . . . . . . . . . . . . . . . . . . . . 35

IV Outputs and results 39

13 Static simulation results and outputs 1

13.1 Static analyses results . . . . . . . . . . . . . . . . . . . . . . . . . . 113.1.1 Set Up Initial position and Rig Move . . . . . . . . . . . . . . 113.1.2 Equilibrium analysis (SINGLE) . . . . . . . . . . . . . . . . . 2

13.1.3 Batch static calculations . . . . . . . . . . . . . . . . . . . . . 613.2 Static instantaneous positions and tensions outputs . . . . . . . . . . 1113.3 Stiffness Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

13.4 Line profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1913.5 Mooring system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

14 Time domain simulation results and outputs 1

14.1 Simulation results interface. . . . . . . . . . . . . . . . . . . . . . . . 214.1.1 Graphical results . . . . . . . . . . . . . . . . . . . . . . . . . 314.1.2 Animation results . . . . . . . . . . . . . . . . . . . . . . . . . 1214.1.3 Fatigue results . . . . . . . . . . . . . . . . . . . . . . . . . . 13

14.2 Simulation results output files . . . . . . . . . . . . . . . . . . . . . . 1514.2.1 Excel files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1714.2.2 Text file . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

14.3 Save and load results . . . . . . . . . . . . . . . . . . . . . . . . . . . 1914.4 Batch results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

14.4.1 a7r format results . . . . . . . . . . . . . . . . . . . . . . . . . 21

14.4.2 Custom batch results . . . . . . . . . . . . . . . . . . . . . . . 2114.4.3 Interface results . . . . . . . . . . . . . . . . . . . . . . . . . . 22

V Tools 31

15 Tables 115.1 Item creation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215.2 Item modification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

15.3 useful tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

15.4 Excel linking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2



8/370

0-viii CONTENTS

16 Graph zones 116.1 Inputs graph zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

16.1.1 Visualisation tools . . . . . . . . . . . . . . . . . . . . . . . . 116.1.2 Export graph . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

16.2 Results graph zones. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

17 Mooring zone 117.0.1 Interaction tools . . . . . . . . . . . . . . . . . . . . . . . . . 117.0.2 Toggle buttons . . . . . . . . . . . . . . . . . . . . . . . . . . 3

18 Line profile representation 118.0.1 interaction tools. . . . . . . . . . . . . . . . . . . . . . . . . . 118.0.2 Export line profile . . . . . . . . . . . . . . . . . . . . . . . . 1

19 Three dimensions visualisation 119.1 Vessel inputs 3D visualisation . . . . . . . . . . . . . . . . . . . . . . 119.2 Results 3D visualisation . . . . . . . . . . . . . . . . . . . . . . . . . 319.3 3D visualization options . . . . . . . . . . . . . . . . . . . . . . . . . 6

VI Abreviations 1

VII Additionnal modules 5

A HydroStar Mooring 7A.1 HydroStar Mooring page . . . . . . . . . . . . . . . . . . . . . . . 7A.2 Mesh database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8A.3 Calculation parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 13A.4 Mesh adaptation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18A.5 HydroStar for Experts users feature . . . . . . . . . . . . . . . . . . . 22

List of Figures 24

List of Tables 33



9/370

Introduction

Welcome to the Ariane7 User Guide and thank you for purchasing the BureauVeritas mooring software.The Ariane7 software aims to be a competitive and interactive tool in a mooringproject design. New possibilities have been developed since the last release of Ari-ane, making Ariane7 a state-of-the-art mooring software for the mooring systemsdesigners benefit. Indeed, in addition to the previous calculation possibilities of"Ariane 6.3 3-Dynamics", this version of the software enables the user to performsimulations closer to reality:

Multi-body simulations: no limits in the number of structures to be mooredtogether;

Shallow water: new developments have been done to perform simulations inshallow water;

The new interactive interface allows the user to visualize easily the projectconstruction, ongoing simulations and visualise the results.

The present User Guide aims to explain how the software interface works andwhat are the main possibilities ofAriane7.This manual has been divided into different parts, corresponding to the main stepsof a mooring project design (see figure1):

Inputs: the different structures to be moored and their loading cases, themooring lines, the site data;

Calculation: static and time domain simulations that can be performed on thedefined mooring system;

Results: outputs given after the calculations.



10/370

0-2 CONTENTS

Figure 1: Global presentation of Ariane7



11/370

CONTENTS 0-3

Figure 2: Ariane7 calculation organisation



12/370

This page intentionally contains only this sentence.


13/370

Part I

Getting started



14/370


15/370

Chapter 1

Minimum requirements

Ariane7 has been developed using a multiplatform language: Python. This lan-guage enables the software to be launched on most of the computers.However some modules ofAriane7need some minimum requirements, for examplethe 3D visualisation. This module needs a graphic card allowing OpenGL to beexecuted.Recommended configuration:

Processor: Intel Pentium 2GHz or equivalent;

RAM: 1Go;

Graphic card: Radeon 9500 or equivalent;

Screen resolution: 1280*1024 pixels.

For a good visualisation of all the interface tools and buttons, the minimum screenresolution should be 1024*768 pixels.



16/370



17/370

Chapter 2

Installation procedure

In order to install Ariane7 on a computer, the only thing the user needs is theexecutable file named SetupAriane7.exe.

Figure 2.1: Ariane7 setup executable file

2.1 Ariane7 setup

When launching this executable file, a popup window appears (see figure2.2) asking

to select a language for the installation procedure.



18/370

2-2 Installation procedure

Figure 2.2: Ariane7setup language choice

Once the user has selected the language for the Ariane7setup tool, clicking on

displays the introduction page of the setup wizard (see figure2.3).In order to continue the installation ofAriane7Bureau Veritas mooring software,

Figure 2.3: Ariane7setup wizard introduction

please follow the instructions given by the installation wizard.Once the installation complete, the installation wizard informs the user that the

installation has completed and if he wants to launch the software automatically (see



19/370

2.2 Ariane7 launching 2-3

figure2.4).

After clicking on the installation of the Ariane7 sofware ends.

Figure 2.4: Ariane7 setup wizard conclusion

Ariane7is now installed.An installation directory has been created (by default: C:/Program Files/BureauVeritas/Ariane7) containing all the files and directories thatAriane7needs to run.

2.2 Ariane7 launching

OnceAriane7installed, it can be launched in many ways, depending on the optionschosen in the setup wizard:

From the Start menu: Start -> Programs -> Bureau Veritas -> Ariane7 ->Ariane7;

From the quick launch tool bar



20/370

2-4 Installation procedure

From a desktop shortcut

In any case, the software can be started launching the Ariane7 icon (see figure 2.5).Once the program launched, a temporary frame appears on the screen (see fig-

Figure 2.5: Ariane7 icon

ure2.6) before displaying the Ariane7 main window (see figure 2.7).

Figure 2.6: Ariane7 splash screen



21/370

2.2 Ariane7 launching 2-5

Figure 2.7: Ariane7main window

As can be seen in the screenshot (see figure 2.7), the first time Ariane7 islaunched a popup window is shown asking for the path to the license file or thelicense server.

When specifying it and cliking on , the license will be taken into account

until next Ariane7 update.Please refer to next chapter to have more information on the different licensingprocedures.



22/370



23/370

Chapter 3

License setting

Ariane7licensing procedure is adjustable to the users expectations:

No license: the user can open the projects but the modifications will not besaved and no calculation can be performed;

1st level license: the user can save projects modifications but no calculationcan be performed;

2nd level license: the user can save projects modifications and perform staticanalyses;

3rd level license: the user can save projects modifications and perform staticand time domain analyses;

4th level license: the user can save projects modifications and perform static,time domain and dynamic analyses (MCS optional module).

Two ways to get a license are available:

Nodelock licensing: it is a license linked to one computer;

Server licensing (with borrow option): there are several licenses on the serverthat can be used by every user on the network.

3.1 FlexLm USB Dongle

If the license file is linked to a dongle, it is needed to plug it first. A USB dongledriver could be needed. It can be downloaded at:www.macrovision.ie/ftp/Hasp/HASP4_driver_setup.zip

To install it, the driver setup should be launched and the instructions given followed.



24/370

3-2 License setting

3.2 Nodelock License configuration

If the license file is linked to a dongle, this one should be plugged and the licensefile must be copied on the computer.To configure the license, Ariane7 must be launched. The license path has to beinput selecting Configuration, Options and entering the full license file path (includ-ing the name of the file) as shown in figure3.1.

Ariane7must be restarted to take into account license modifications.

Figure 3.1: Nodelock license configuration

3.3 Server License configuration

If the license file is linked to a dongle, this one should be plugged on the server andthe license file copied on the license server. The FlexLm UserGuide can be used toconfigure the license server.

Regarding the Client part of the license, the computer must be connected to thenetwork. The server name has to be input in Ariane7 selecting Configuration,Options and entering the server name in the appropriate field as shown in figure 3.2.

Ariane7must be restarted to take into account license modifications.

Figure 3.2: Nodelock license configuration

With a server licensing service, a user can directly borrow a license for a determined

period. This option is detailed in section 4.1.3 of this document.



25/370

Chapter 4

Update projects to the Ariane7format

Ariane7 is the new version of the Ariane program, containing the result of morethan 20 years of development.However this new version has been totally reprogrammed in order to offer a betteruser interface and new calculation possibilities. Hence it is not possible to directlyopen old projects into the Ariane7 interface.

Nevertheless, it is possible to automatically convert projects and inputs to the Ar-iane7format (see section 4.1.3 of this document):

Ariane6.3 project files: a dedicated tool allows the user to convert Ariane6.3project files to the Ariane7 format;

Loading cases input files: dedicated tools allow the user to convert Ariane 6.3loading case input files to the Ariane7 format. These loading case files con-cern added mass, damping, Response amplitude Operators, Quadratic Trans-fer Functions, wind and current coefficients definition;

Ariane 6 vessel mesh definition files: if the user wants to keep the same vesselmesh from the old version to the new one, it is possible to convert the Ariane6vessel mesh definition file to the Ariane7 format;

HydroStar vessel mesh definition files: the same operation can be done con-cerning HydroStar vessel mesh files definition.



26/370



27/370

Part II

Inputs



28/370


29/370

Chapter 5

Main interface DescriptionOnce Ariane7started, an empty display appears (see fig: 5.1).

The following sections describe the main features of the interface.

Figure 5.1: Empty display



30/370


31/370

5.1 Menu bar 5-3

5.1.2 Configuration menu

Figure 5.4: Configuration menu

"Options" allows the user to access a note-book containing different interfacesetting parameters (see fig5.5).

Figure 5.5: Options

"General" permits to define the interface parameters (window size, licensepath...);

"Main Interface" defines the interface settings (colors, file opening...);

"MooringSystem" specifies the mooring area definition;

"LineSetup/LineProfile" allows the user to choose the color parameters for the

Line Setup or Line Profile page;



32/370

5-4 Main interface Description

"Calculation parameters" presents the computing parameters which can bechanged. A great care has to be taken before changing these values;

OpenGL concerns the 3D visualisation tool ofAriane7. Some parameterscan be set in this frame concerning the waves elevation animation. For exam-ple,Ariane7calculates the 3D wave elevation which can be a little time con-suming at the end of a time domain simulation. This option can be bypassedunticking With 3D irregular waves so that the time domain simulation goesfaster.

The following section give more details on the tabs items.

General tab

Figure 5.6: General tab

Window size: Size of the main Ariane7 window (width x height in pixels).Default size is 1024x768 pixels;

Number of temporary files: This enables the user to set the number oftemporary files used in the on fly save and load mechanism. This mechanism

is explained in section5.2;



33/370

5.1 Menu bar 5-5

Delete temporary file on exit: Deletes or not the temporary files used forthe on fly save and load mechanism when closing Ariane7;

Remember active page: Saves the interface page that was active whenclosing Ariane7. This page will be displayed when reopening Ariane7;

Check for update on Ariane7 launching: Checks or not if a new revision ofAriane7 is available on the www.veristar.com website when opening Ariane7.A web connection is necessary;

Default time to display messages (in sec): Time during which messageswill be displayed in the status bar (see section5.4.2);

Auto save time interval (in sec): Time interval between auto-backups.At each of these time intervals, the Ariane7 project file will be saved inthe temporary user directory. If the Ariane7 GUI fails, a message will bedisplayed when reopening the GUI asking the user if he wants to open anautomatically saved file (see section5.3);

Select foreground color of the main interface: When clicking on thebutton, a color palet will be displayed allowing the user to choose a color forthe main Ariane7interface;

License server/License file path: Input field in which the user has tospecify the total path to the license file (.lic) or the address of the licenseserver (see Chapter3).



34/370


Main interface tab

Figure 5.7: Main interface tab

Color of the tree background: When clicking on the button, a pallet opensallowing the user to select the background color of the tree (see section5.4.1).

Color of the characters selected: When clicking on the button, a palletopens allowing the user to select the foreground color of the selected tree items

(see section5.4.1).

Background color of the characters selected: When clicking on the but-ton, a pallet opens allowing the user to select the background color of theselected tree items (see section5.4.1).

Tree indentation: Right indentation to be applied to the tree sub-branchesaccording to the upper branch (see section5.4.1).

Tree width (in px): Width of the tree (see section5.4.1) in the main Ariane

window. The width has to be entered specifying the desired number of pixels.



35/370

5.1 Menu bar 5-7

Start option for the tree display: If ticked, the tree (see section5.4.1) willbe displayed at Ariane launching. Note that there are options to hide the treein the Ariane main window.

Log height (in px): Defines the height of the Info Log (see section5.4.3)frame in the Ariane main window. This height has to be entered giving thedesired number of pixels.

Log background color: Clicking on the button displays a pallet allowing theuser to define the color of the Info Log background color (see section5.4.3).

Open Excel files automatically: If ticked, Excel results files will be openedautomatically. Hence the user wont have to browse his files to find the Excelresults files.

Open text files automatically: If ticked, text results files will be openedautomatically. Hence the user wont have to browse his files to find the textresults files.

Text editor: The user can define the total path to his favorite text editor(it can be Excel if desired), so that all results files will open using the choseneditor. Note that the files will open automatically using this editor only if thetwo check buttons located here above have been ticked.

Default extension for results files: The user can define a default extensionfor the results files. All results files will then be saved with this extension.

Show warning boxes / highlight the info log: The user can choosebetween two options. If ticked, show warning boxes will be displayed whena problem occurs. If not, the warning message will be displayed in the InfoLog (see section 5.4.3) which will be highlighted and a warning sign will bedisplayed in the status bar for a limited time.



36/370


Mooring system tab

Figure 5.8: Mooring system tab

Mooring zone definition (see section9.1.1)

Mooring zone color: Clicking on the button displays a pallet enablingthe user to choose the mooring zone background color.

Mooring zone border color: Clicking on the button displays a palletenabling the user to choose the mooring zone border color.

Mooring zone border width (in px): The input field should be filledwith the desired width of the mooring zone in pixels.

Canvas motion e w (in px): Number of pixels where the mooringzone will be translated when the user presses the and keyboard arrows. The default value is 10 pixels, meaning that the moor-ing zone will be translated of 10 pixels in the West direction when the key is pressed and 10 pixels in the East direction when the key is pressed.

Canvas motion n s (in px): Number of pixels where the mooring

zone will be translated when the user presses the and



37/370

5.1 Menu bar 5-9

keyboard arrows. The default value is 10 pixels, meaning that the moor-ing zone will be translated of 10 pixels in the North direction when the key is pressed and 10 pixels in the South direction when the key is pressed.

Toolbar width (in px): Allows the user to define the mooring zonetoolbar width in pixels.

Color of crosses: Clicking on the button displays a pallet enabling theuser to choose the mooring zone crosses color.

Resize window automatically: If ticked, the mooring zone displaywill be adapted to the Ariane main window size.

Graphical properties of elements (see section11.5.1)

Constant load color: Clicking on the button displays a pallet enablingthe user to choose the constant loads arrows color.

Arrow definition for constant load: This input field allows the userto modify the constant loads arrow size.

Arc definition for size: This input field allows the user to modify theconstant loads arc size.

Thruster length (px): The input field allows the user to modify thethrusters representation size in pixels.



38/370


Line setup / line profile tab

Figure 5.9: Line Setup tab

This tab allows the user to change the color of the different elements listed, con-cerning the Line Setup and Line Profile pages.



39/370

5.1 Menu bar 5-11

Calculation parameters tab

Figure 5.10: Calculation parameters tab

Some of these parameters have to be manipulated with great care as they areset for a good convergence of the internal algorithms.Static calculation parameters

dx parameter (in m): Vessel surge default motion to calculate stiffness;

dy parameter (in m): Vessel sway default motion to calculate stiff

ness;

dphi parameter (in rad): Vessel yaw default rotation to calculate stiffness;

Force tolerance (in kN): Force tolerance for the static equilibrium conver-gence;

Moment tolerance (in kN.m): Moment tolerance for the static equilibriumconvergence;

Newton step divider: Static equilibrium parameter. See Theoretical Man-

ual for more information;



40/370


Max nb of stability researches: Maximum number of stability researchesduring static equilibrium calculation. The calculation fails if no stable solution(according to convergence criteria) was found;

Coefficient to favor moment compared to loads: Rigmove algorithmparameter. See Theoretical Manual for more information;

Coefficient to favor loads compared to distance: Rigmove algorithmparameter. See Theoretical Manual for more information;

Coefficient to define the max. limit: Rigmove algorithm parameter. SeeTheoretical Manual for more information;

Tolerance for rigmove calculation: Rigmove algorithm parameter. SeeTheoretical Manual for more information;

Coefficient to influence line distance mini: Rigmove algorithm parame-ter. See Theoretical Manual for more information;

Eigenvals tolerance: Stability tolerance according to the maximum eigen-value. If the maximum eigenvalue of the stiffness matrix is over this tolerance,the equilibrium position is considered stable. This is part of the Newton algo-

rithm. See Theoretical Manual for more information;

Max number of iterations: Maximum number of iterations to find a staticequilibrium position.



41/370

5.1 Menu bar 5-13

OpenGL tab

Figure 5.11: OpenGL tab

With 3D irregular waves: If ticked, Ariane is computing the three dimen-sional irregular waves after Time Domain Simulations. These 3D waves willbe displayed in the 3D animations. This takes some time and only concernvisualisation. The user may untick this option for performance reasons;

Number of free surface mesh elements: Discretisation of the 3D free

surface mesh (only for visualization purpose);

Number of element for 1 irregular wave: Discretisation of one irregularwave mesh (only for visualization purpose);

Number of 3D views rows: The 3D view will be split into as many rowsas defined here. Each row will contain its own 3D view;

Number of 3D views columns: The 3D view will be split into as manycolumns as defined here. Each column will contain its own 3D view.



42/370


5.1.3 Tools menu

Figure 5.12: Tools menu

Convert files

"Convert files" allows the user to convert files to the Ariane7 format.

Ariane6.3 project files: Asks for an Ariane6.3 file to convert (.ari), thenfor the saving path and name of the converted file (.ar7). It is then possibleto directly open the converted file into the Ariane7interface. The converted

file will then contain every project input but no calculation parameters: itreads the Ariane6.3 .ari and .lin files;

Ariane6 vessel loading case files: opens a window allowing the user toconvert Ariane 6.3 loading case files to the Ariane7 loading case files for-mat (Added mass, damping, QTF, RAO, wind and current coefficients). TheAriane7loading case file format is given in section 6.3;

Ariane6 vessel mesh files: opens a window allowing the user to convertAriane 6.3 mesh files to the Ariane7 format. Ariane7 mesh files format isgiven in section6.2.2;

HydroStar vessel mesh files: opens a window allowing the user to convertHydrostar mesh files to the Ariane7 format. Ariane7 mesh files format isgiven in section6.2.2;

WAMIT vessel loading case files: opens a window allowing the user toconvert output file from WAMIT into the Ariane7 input loading case format.The user will have to define the characteristic length defined in WAMIT andthe reference point for translations. Then clicking on the different buttons, hewill be asked to input the WAMIT output files: *.1 for the Added Mass, *.4for the RAO, *.8 for the QTF. Once selected, the files will be converted to the

Ariane7format (see section6.3).



43/370

5.1 Menu bar 5-15

AQWA output files: Opens a window allowing the user to convert AQWAFullQTF (QTF-C) to the Ariane7 format.

MOSES output files: Opens a window allowing the user to convert MOSESRAO files to the Ariane7 format.

Borrow license

"Borrow Licenses" permits to borrow a license on a licenses server, during a missionfor example (see figure5.13). The user has to be warned that if a license is borrowed

on the server, there will be one license missing on it during the borrowing time. Ifthe borrowing has been successful, a frame is displayed (see figure5.14);

Figure 5.13: Borrow licenses for a limited duration

Figure 5.14: Successful license borrowing



44/370


45/370

5.1 Menu bar 5-17

5.1.4 Help menu

Figure 5.17: Help menu

The "Help" menu provides information about Ariane7 and connects to the dif-ferent manuals that can help the user:

The "User Guide" (the present manual) dealing with the software use;

The "Theoretical Manual" which gives information on the Ariane7theoreticalbackground.

In addition to the manuals is an About item (see figure5.18) containing the fol-lowing information:

A revision number informing the user on the software version. This numbershould be communicated to the development team when contacting them;

The E-mail address to contact the development team in case a problem oc-curred or if the user has any question regarding the software.



46/370


Figure 5.18: Ariane7 About



47/370

5.2 Tool bar 5-19

5.2 Tool bar

Figure 5.19: Tool bar

creates a new Ariane v7 project

opens existing Ariane v7 projects

saves the active project

saves the active project as ...

closes the active project without closing Ariane7

refreshes the active project

shows or hides the tree (will be explained in section 5.4.1)

shows or hide the info log region of the Ariane7 interface (see section 5.4.3)

opens the Ariane7 Microsoft standard help.

represent an "on fly store and load" sys-tem that can store and load different steps of a

project quickly in temporary files. BecauseAriane7 does not have an undo func-tion, this load and store system is particularly useful when doing an experiment ona project. Five slots are available in the combo box to save different versions of thesame project (possibility to set more temp files in Configuration -> Options ->General).

It is important to know that the modifications that are made to the project bythe user are not automatically saved, like the previous version of Ariane did. All

modifications should be saved regularly clicking on .



48/370


5.3 Automatic saving

There is no automatic saving implemented in Ariane7. However, a back up file issaved every 5 minutes by default in the temporary user repository. If a project filecrashes, the user will be allowed to load the back up file when relaunching Ariane7.One should be warned that this file, if recovered, should be saved into the desireddirectory.



49/370

5.4 Creating a new project 5-21

5.4 Creating a new project

After clicking on , a new page is displayed (see figure5.20).As can be seen in figure5.20, the "Home page" is divided into two sections.

Figure 5.20: Home page

On the right part of the page the user can find input fields and text zones intendedto provide information on the project.

Project name: Name of the project that will be written in the output files;

User name, Company: User personal information;

Creation date: Project creation date;



50/370


User comments frame: Text zone in which the user can specify the projectscharacteristics and personal comments. These comments will appear in theoutput files;

Export light project: Suppresses all that can be recalculated in the databasein order to reduce its size and asks the user to save it in his computer (Dep-recated in Ariane7.0.2);

Text file project summary: Exports a summary of the global project in atext file;

Regenerate project summary: Generates a summary of the global projectin the text zone underneath;

General parameters: Project dependant general parameters that will beeffective in the whole database:

Default number of spectrum frequencies: this number is the default valuesfor the discretisation of spectra. However this value can be changed whendefining the environmental conditions;

Env TS duration (s): duration of the environment time series displayed

in the environment page. Please note that this parameter only concernsvisualization of the input;

Air density: air density used for the calculation of wind loads;

Water density: water density used for the calculation of current loads;

Gravity: gravity acceleration;

Apply parameters to the current project: button on which to clickfor the specified parameters to be applied to the whole database.



51/370


Figure 5.21: Description of the project

On the left part of the screen is a zone called the "tree", allowing the user tonavigate through the software.

5.4.1 Tree

Figure5.22represents the tree, summing up all the steps necessary to go throughwhen building a new project.As can be seen in figure 5.22,the tree is divided into several sections or "branches".The tree and its branches will evolve with the project, allowing the user to visualizehis progress.



52/370


Figure 5.22: Tree

The tree always appears on the left of the screen. However , located in thetool bar, allows the user to show or hide it.Branches of the tree can be accessed left cliking on them. However, some useful

options can be displayed right clicking on the different items.



53/370


Next chapters of this guide present the different items of the tree, in order to builda project step by step.

5.4.2 Status bar

The status bar is located at the bottom of the screen. It gives information (onthe entry fields for example) and house the progress bar during the calculations.

Figure5.23gives an example of what can be displayed in the status bar (in this casewhen clicking in the "Project name" field).

Figure 5.23: Status bar



54/370


5.4.3 Information log

The information log is located at the bottom of the main Ariane7window.

This region can be hidden or displayed clicking on .This log displays important information during the project creation and during cal-culation. The user will find here the history of his actions and the errors (if any)that were generated.



55/370

5.5 Ariane7 axis systems 5-27

5.5 Ariane7 axis systems

5.5.1 Global axis system

The global axis system is the axis system which origin is the center of the mooringzone, called C, located on the mean water line. Its axis are pointing towards theEast and North directions respectively called E and N. Figure 5.24gives a repre-sentation of this axis system.

The environmental conditions and the vessel headings are given from the north

Figure 5.24: Global axis system representation

axis, as can be seen in figure5.25.



56/370


Figure 5.25: Environmental conditions headings in the global axis system

5.5.2 Local axis system

The local axis system is linked to the vessel, representing its coordinates in the

global axis system. Its origin location according to the vessels main dimensions isthe following:

always on the vessels keel;

at a longitudinal location specified by the user from the aft perpendicular;

at mid breadth.

Figure5.26gives a representation of the local axis system.



57/370


Figure 5.26: Local axis system representation

The vessels loading cases are defined in this coordinate system (see figure 5.27).



58/370


Figure 5.27: Loading cases axis system representation

The vessel main particulars (fairleads, turrets, thrusters, ...) are defined inthis local acis system but the z-axis points upwards. This convention was chosen forcompatibility reasons with Ariane6.3.Figure5.28gives a representation of the relation between the global and the localaxis systems.



59/370


Figure 5.28: Relation between the local and the global axis systems



60/370



61/370

Chapter 6

Vessels page

This chapter concerns the creation of vessels and the description of their loadingcases.In order to start the vessel definition, please click on "VESSELS" in the tree.

6.1 Vessel choice

Figure6.1shows the vessel management page. This page gives information on thecontents and proposes to choose a vessel type (tanker, FPSO, barge, buoy or semi-sub).



62/370

6-2 Vessels page

Figure 6.1: Vessels management page

If one clicks on the "Add an FPSO" button for example, the tree is updated withthe vessel that has been chosen (an FPSO for instance), along with a new branch:"LoadingCase(1)" (see fig6.2).

In addition to the tree update, a new page has been opened on the right hand side

Figure 6.2: Tree updated when adding a vessel

of the tree. This page corresponds to the vessel that has been chosen.



63/370

6.2 Description of the vessel geometry 6-3

6.2 Description of the vessel geometry

Figure 6.3 presents the vessel geometrical parameters page. This page containsdifferent parts:

A brief description of the vessel. If the name of the vessel is changed, the treewill be updated with the new name;

Input fields allowing the user to enter the main dimensions of the vessel andthe position of the vessel local axis system. Please note that the local axissystem is always located on the keel of the vessel (see figure5.26);

A three dimensions visualization of the vessel (see section 6.2.1);

A note book allowing the user to define turrets, fairleads, control points, fend-ers attach points and thrusters.

6.2.1 Three dimensions visualization

A three dimensions representation is shown, allowing the user to check the maincharacteristics of the vessel (see fig6.3). All the characteristics of the vessel will berepresented in this 3D tool. The local axis system and the dimensions of the vesselare set by default when the page is opening. However the fairleads, control points,fenders and thrusters will be displayed with a colored sphere when set by the user.Section6.2.3will deal with their creation.If the user wants more details on the 3D visualisation tool, please refer to chapter19.



64/370

6-4 Vessels page

Figure 6.3: Description of the vessel overview

6.2.2 Definition of a vessel mesh

Ariane7 contains a database of meshes for the five different kinds of vessels it pro-

poses: a tanker, an FPSO, a barge, a buoy and a semi-sub. This is only a question ofvisualization as the calculation doesnt take into account the meshing of the vessels,but only the loading cases applied to the structures.

However it is possible to load a specific mesh by clicking on the button inthe "Description of vessel" frame. This will allow the user to select a file containinga mesh description.Two files have to be generated: one containing the mesh itself (see figure6.4) andanother one containing the material and appearance of the mesh (for visualizationpurposes, see figure6.5).The material file given in this guide is an example.



65/370


Figure 6.4: Mesh file format

Figure 6.5: Material file format



66/370

6-6 Vessels page

6.2.3 Vessel main particulars definition

The notebook in the bottom half of the page contains the following tabs:

Turrets: this tab allows the user to generate turrets on the vessel. A turret isgenerally used for "single point mooring" systems. The way to define a turretis explained in section6.2.4;

Fairleads: this tab aims to create fairleads on the vessel. This can be doneusing different methods, as it is explained in section6.2.5;

Control points: these points are meant to be created in order to follow theirtrajectory during the simulations. They can be created as explained in sec-tion6.2.6;

Fenders attach points: Fenders can be created between two vessels (linked toone of the vessels) or between a vessel and a dock (linked to anchors). Thecreation of their attach point on a vessel will be explained in section 6.2.7.Note that only the fenders attach point will be created in the vessel geometrydefinition, the fenders themselves will be defined later (see section 9.6);

Thrusters: this tab allows the user to define thrusters on the vessel. They can

be created in the way defined in section6.2.8.

This part of the project construction concerns only the vessel and its particularities.Once all the items of the vessel created, the user will be able to connect them to lines(turrets and fairleads), observe the trajectory of specific points (control points), setan interaction between two vessels (fenders) and apply thruster loads in the local orglobal axis systems.

6.2.4 Turrets definition

A turret model has been implemented in Ariane7, making the sum of the linemoments at the center of the chain table zero.In order to create a turret object, the user will have to define the center of the chaintable and the fairleads located around it. The "Points properties" frame containsinput fields that have to be filled in order to create the center of the chain table (seefigure6.6).More explanations about the tables options are available in chapter 15.

Once the name and coordinates of the turret center filled, clicking on createsa new chain table center. This one appears in the table with its coordinates (see

figure6.6) and in the three dimensions visualization of the vessel (yellow sphere).



67/370


Figure 6.6: Turrets definition

Once the center of the chain table defined, fairleads can be created around it,defining a radius from the center and an angle from the vessel x-axis clockwise. Twomethods are available to do so:

One by one definition: each of the fairleads are defined one by one by the user.This is done in the exact same way as the chain table center creation. Pleasenote that it is also possible to copy/paste from Excel, if a chain table centerhas been selected;

Automatic fairlead generation: this tool allows the user to create fairleadsalong an arc, which center will be the selected chain table center. The userhas to define the radius from the chain table center, the first azimuth from thevessel local x-axis, the extent of azimuth and the number of fairleads that are

to be generated (see figure6.8).



68/370

6-8 Vessels page

Note: More than one line can be connected to a turret fairlead.

x and y coordinates are given in the vessel local axis system (see figure 5.26).However, the z coordinate of the turret is given according to the altitude of thepoint from the vessel keel: the altitude is given in the opposite direction of the localz axis.

At least one of the chain table center coordinates has to be different from apoint to another: two chain table centers cannot be located at the same place.

6.2.5 Fairleads definition

Figure 6.7: Fairleads definition

There are two different ways of defining fairleads.

The first one is to define them one by one using the table buttons (see chap-ter15) on the top left of the fairlead tab;

The second allows the user to generate many fairleads in one click using thefairlead generator locating at the bottom right of the fairlead tab (see fig-

ure6.8).



69/370


Figure 6.8: Fairlead generation example

This generator allows the user to create fairleads along an arc. The user justhas to define the center and the radius of the arc, the first azimuth, the extension

domain and the number of fairleads he wants. Then clicking on will cre-ate the fairleads which will appear in the table and in the 3D visualization window(green spheres).Note: More than one line can be connected to a fairlead.



70/370

6-10 Vessels page

6.2.6 Control points definition

Figure 6.9: Control points definition

The control point tab of the note book allows the user to create control pointsanywhere on the vessel. These control points are meant to follow the trajectory ofa special location of the vessel.Their definition is done in the same manner as the turret and fairleads definitionabove. They appear as blue spheres in the 3D visualization.



71/370


6.2.7 Fenders attach points definition

Figure 6.10: Fenders attach points definition

The fenders attach points tab of the note book allows the user to create fendersattach points anywhere on the vessel. These fenders are meant to push away fromthe vessel a second vessel. Their definition is done in the same manner as the turretanf fairleads definition (see section6.2.5).They appear as black spheres in the 3D visualization. In the next steps of the projectcreation, the user will be able to set the fender characteristic (behavior) and specifywhich vessel is interacting with it (see section 9.6).



72/370

6-12 Vessels page

6.2.8 Thrusters definition

Figure 6.11: Thrusters definition

The thrusters tab of the note book allows the user to set the thrusters. Thethrusters location is set in the same way as the turrets and fairleads one (see sec-tion6.2.5).In addition to the location of the different thrusters, the user can impose a direction(in degrees) and intensity (in kN) according to their action on the vessel. Howeversetting the direction and intensity is not compulsory in this section as it will bepossible to do it later when performing calculations.Please note that the input labeled 0:local/1:global is to set the thruster directionin the local or global axis systems. If 0, azimuth of the thruster from the local x-axis

clockwise; if 1, azimuth of the thruster from the global North axis clockwise.Thrusters appear as purple spheres or arrows (depending on the intensity) in the3D visualization.



73/370

6.3 Loading Case 6-13

6.3 Loading Case

At the vessel creation, a tree branch has been displayed under the vessel name:"LoadingCase(1)". The page displayed when left clicking on it contains the hydro-dynamic and aerodynamic data concerning the vessel (see figure 6.12).

Figure 6.12: Loading case overview



74/370


75/370


6.3.2 Added mass

The reference point for the added mass definition is located at the vessel center ofgravity.

Single added mass

The first input is "Added mass". There are two ways to fill in this input. The firstone is simply to fill in the fields in the interface (see fig 6.14). Otherwise the valuescan be copied from an Excel file and pasted in Ariane or, on the contrary, copiedfrom Ariane and pasted in a file with the extension "csv", "xls", "txt" or "dat", using

the two buttons and (or the keyboard shortcutsCtrl + cand Ctrl + v.The added mass units are in kg,kg.m,kg.m2.

Figure 6.14: Single added mass interface



76/370

6-16 Vessels page

The added mass matrix values are presented in table 6.1:The second way of entering the added mass values consists in loading a file which

Masurge_surge Masurge_sway M asurge_yawMasway_surge Masway_sway Masway_yawMayaw_surge Mayaw_sway Mayaw_yaw

Table 6.1: Single added mass definition

format is given in figure6.16. To do so, the user has to click on . Thena dialog window (see fig6.15) appears where the user is invited to browse into hisfiles and to choose the one containing the added mass matrix.

Figure 6.15: Dialog window for added mass



77/370


The file (with the extension "csv", "txt" or "dat") must have the same format asshown in figure6.16.

In this example, all lines preceded by "#" are recognized as comments byAriane7,

Figure 6.16: Added mass file

which will not pay attention to them.If the added mass file introduced before is loaded in Ariane7, the interface is up-dated as shown in figure6.17.



78/370

6-18 Vessels page

Figure 6.17: Added mass entered

Coupled added mass

This section concerns multi-body definition of the added mass: the present vesseltakes into account the added mass of another vessel. This could be necessary in aside-by-side analysis in which many of the vessels interactions have to be taken into

account.Table6.2shows how to define the added mass matrix in such a case.

When defining the coupled vessel added mass, the user will have to select the

Maves1surge_ves1surge Maves1surge_ves1sway Maves1surge_ves1yawMaves1sway_ves1surge Maves1sway_ves1sway Maves1sway_ves1yawMaves1yaw_ves1surge Maves1yaw_ves1sway M aves1yaw_ves1yaw

Maves2surge_ves1surge Maves2surge_ves1sway Maves2surge_ves1yawMaves2sway_ves1surge Maves2sway_ves1sway Maves2sway_ves1yawMaves2yaw_ves1surge Maves2yaw_ves1sway M aves2yaw_ves1yaw

Table 6.2: Coupled added mass definition

correct coupled vessel and give the other part of the6x6matrix in the associated ves-

sel added mass. The coupled vessel can be selected from .The second method for entering the coupled added mass is to load a file clicking on

. The file format is given in figure 6.18.



79/370


Figure 6.18: Coupled added mass file

undimensional added mass

Note that it is possible to display the added mass matrix as dimensional or undi-

mensional values, clicking on and .As can be seen in figure6.16, it is possible to define the file values as dimensional(type 1) or undimensional (type 0) values.In order to get dimensional values from undimensional values, the added matrixshould be multiplied by the matrix given in table 6.3.water being the water density inkg/m

3 andlppthe length between perpendicularsof the vessel.



80/370

6-20 Vessels page

water lpp3 water lpp

3 water lpp4


3 water lpp4


4 water lpp5

Table 6.3: Undimensional matrix

6.3.3 Damping

Damping can be entered in two different ways, either filling in the interface tablevalues or entering an input file, just like the added mass.

The input file format is shown in figure 6.19.The damping matrix units are given in kg/sand kg.m2/s.Note that the damping matrix is always diagonal in Ariane7 assumptions.

This damping should take into account for both the hydrodynamic dampingand the line damping.

As for the added mass matrix, the damping matrix can be displayed using dimen-

Figure 6.19: Additional damping file

sional or undimensional values.

undimensional damping

The same adimensionalisation matrix than the added mass is used for undimensional

damping.



81/370




82/370

6-22 Vessels page

6.3.4 Response Amplitude Operators

To enter "Response Amplitude Operators" (RAO), the user must load a file in thesame manner as for the added mass matrix or the damping matrix. However it is notpossible to directly enter the RAO values in the interface considering the amount ofdata.The file format required is shown in figure6.20.

As for the added mass file, "#" is the comment character.

Figure 6.20: RAO file

Note that each value is separated from the other by a tabulator or with one or morespacing.The file has to contain the following keywords:

"RAO_data:": tells Ariane7 that the file contains RAO values;

"headings:": precedes the enumeration of all the wave headings (in degrees);

"frequencies:": precedes the enumeration of all the wave pulsations (in rad/s);



83/370


"reference point:": precedes the coordinates of the reference point where theRAO forces are defined (in the local axis system). Note that the user has tobe careful when entering this value because its position corresponds to the onegiven by the software that calculated the RAO. Two options are available:

Define the coordinates of the point in the vessel local axis system: xloc, yloc, zloc(WARNING:zloc has to be defined considering the local z-axis pointingupwards)

Write COG instead of point coordinates. Ariane7 will set the RAO ref-erence point at the vessel center of gravity. This means that if the user

changes the center of gravity location in the interface, the RAO referencepoint will follow.

wave reference point:": this is an optional key word. This option is usedto specify the incident wave reference point on the vessel. By default thisreference point is the point where RAO are calculated (see reference pointhereabove). However it is possible to modify the wave reference point specify-ing new coordinates in the vessel local axis system or writing C OG. The RAOphases will then be calculated according to this new wave reference point;

"raos:": precedes the RAO forces definition (module (meters) and phase(degrees))for each of the six degrees of freedom. These degrees of freedom have to begiven in the following order: "Surge", "Sway", "Heave", "Roll", "Pitch" and"Yaw". Each table corresponds to one heading and each line to a frequency.

When loading this file in Ariane7, RAO can be plotted in a graph zone (see fig6.21). To do so, items to be plotted can be selected in the lists. In addition, tickingModule (m) or Phase (deg) show the corresponding values of the RAO from theinput file.

Note that if isnt ticked, the user needs to enter RAO on 0-360degrees, otherwise the definition on 0-180 degrees is enough.

RAO can be plotted in two ways: in a cartesian or polar graph (see figures 6.21and

6.22). Clicking on or allows the user to plot the RAO forcesagainst circular frequencies (rad/s) or periods (s).The graph tools use is explained in chapter 16.1.



84/370

6-24 Vessels page

Figure 6.21: RAO cartesian graph

Figure 6.22: RAO polar graph



85/370


6.3.5 Quadratic Transfer Functions

As can be seen in the Theoretical Manual, many formulations are now consideredto calculate the slow drift loads in Ariane7: Newman approximation (QTF0), BVapproximation (QTF0+QTF1), FullQTF formulation (QTF-C), Wave/Current in-teraction (QTF0+current coefficients).This section deals with the definition of QTF0 and QTF1.

QTF0

The QTF0 are the Quadratic Transfer Functions calculated fromaccording to theNewman approximation (please refer to the Theoretical Manual for more infor-mation).The QTF0 file format is presented in figure 6.23 (the forces have to be given inkN/m2 and kN/m). In addition, the way to load the file and the graph zone prop-erties are identical between the RAO tab and the QTF one.The file has to contain the following keywords:

"QTF_data:": tellsAriane7that the file contains QTF values;

"headings:": precedes the enumeration of all the wave headings (in degrees);

"frequencies:": precedes the enumeration of all the wave pulsations (in rad/s);

"reference point:": precedes the coordinates of the reference point where theQTF forces are defined (in the local axis system). Two options are available:

Define the coordinates of the point in the vessel local axis system: xloc, yloc, zloc(WARNING:zloc has to be defined considering the local z-axis pointingupwards)

Write COG instead of point coordinates. Ariane7 will set the QTF ref-erence point at the vessel center of gravity. This means that if the userchanges the center of gravity location in the interface, the QTF referencepoint will follow.

wave reference point:": this is an optional key word. This option is usedto specify the incident wave reference point on the vessel. By default thisreference point is the point where QTF are calculated (see reference pointhereabove). However it is possible to modify the wave reference point specify-ing new coordinates in the vessel local axis system or writing C OG. The QTF

phases will then be calculated according to this new wave reference point;



86/370

6-26 Vessels page

"qtfs:": precedes the QTF0 forces definition (Fx, Fy (kN/m2) and Mz (kN/m)).Each table corresponds to one heading and each line to a frequency.

Figure 6.23: QTF file for a Newman approximation



87/370


88/370


89/370


Figure 6.26: QTF file for BV approximation



90/370

6-30 Vessels page

When loading the file, it is possible to visualize the forces in the graph zone,selecting the QTF1 radio button (see figure 6.27). Please note that this option isonly available when QTF1 have been entered in Ariane7.

Figure 6.27: QTF1 graph



91/370


6.3.6 Complete Quadratic Transfer Functions

Ariane7 provides the possibility to enter full (or complete) QTF. These values allowthe user to have more accurate results according to the mooring system configuration(please refer to the Theoretical Manual for more information). As for RAO andQTF data, QTF-C have to be loaded from an ASCII file. Figures6.29and6.28giveexamples of QTF-C file formats.The files shown in figures6.29and6.28have to contain the following keywords:

"QTFC_data:": informs Ariane7 that the following data concerns full QTF;

"software:": precedes the type of QTFC definition:

if 0, the QTF are given according to the couple of frequencies (i, j)(see figure6.28);

if 1, the QTF are given according to the couple (, ) (see figure6.29).

"headings:": precedes the enumeration of the all the wave headings (in degrees);

"wave frequencies:": precedes the enumeration of all the wave frequencies (inrad/s);

"difference frequencies:": precedes the enumeration of all the delta wave fre-quencies (in rad/s) (if the QTFC software type is 1). Otherwise, if the QTFCsoftware type is 0, the keyword should be specified but no values written un-derneath;

"reference point:": precedes the coordinates of the reference point of the com-plete QTF forces. if0., 0., 0.: center of local axis system. Please note that it isalso possible to write cog instead of the coordinates of the point: Ariane7will then automatically set the moment reference point to the defined vesselcenter of gravity;

wave reference point:": this is an optional key word. This option is used tospecify the incident wave reference point on the vessel. By default this ref-erence point is the point where QTF-C are calculated (see reference pointhereabove). However it is possible to modify the wave reference point spec-ifying new coordinates in the vessel local axis system or writing COG. TheQTF-C phases will then be calculated according to this new wave referencepoint;

"qtfcs:": precedes the QTF-C forces definition (real and imaginary parts) foreach of the forces and moment in the water plane (in kN/m2 andkN/m). The

forces have to be given in the following order: force along the x-axis, force along



92/370

6-32 Vessels page

the y-axis and the yaw moment. Each sub-table corresponds to one headingand one frequency, the number of lines being the number of delta frequencies(software= 1) or the number of coupled frequencies (software= 0).

Figure 6.28: File format of QTFC data (software= 0)



93/370


Figure 6.29: File format of QTFC data (software= 1)



94/370

6-34 Vessels page

Figure6.30shows the graph zone that allows the user to display the Full QTFthat have been entered.

Figure 6.30: Graphical display of QTFC data

6.3.7 Cross waves full QTF

This option is not available yet as it is in validation process.



95/370


6.3.8 Wind and current coefficients/forces

The way to enter wind or current coefficients in their respective pages is the same,as can be seen in figures6.31and6.32.

There are three manners to define these coefficients.

Figure 6.31: Wind page overview

Figure 6.32: Current page overview



96/370

6-36 Vessels page

First method The first method consists of entering coefficients manually, usingAriane7interface (see fig6.33).

The interface allows the user to enter the wind and current characteristics as forces

Figure 6.33: Current coefficients entered manually

(longitudinal and transversal forces in kN.(m/s)2 and yaw moment in kN.m.(m/s)2)or coefficients.The user also has to fill in the "Vessel description" and the "Moment reference point"frames. The points then appear in the table.

Second method The second method consists in loading an input ASCII file which

format is given in figure6.34, by clicking on .



97/370


Figure 6.34: Wind coefficients or forces file format

As can be seen in figure 6.34, the wind and current coefficients file need thefollowing keywords:

Wind coefficients file:

"wind_data:": informsAriane7that the file contains wind coefficients;

type:: if set to 1, defined as wind coefficients; if set to 2, defined as

wind forces;



98/370


99/370


Current coefficients file:

Figure 6.36: Current coefficients or forces file format

"current_data:": informsAriane7 that the file contains current coeffi-cients;

"headings:": precedes the enumeration of the all the current headings (in

degrees);



100/370

6-40 Vessels page

type:: if set to 1, defined as wind coefficients; if set to 2, defined aswind forces;

"reference point:": precedes the coordinates of the current coefficientsreference point. Note that it is also possible to write cog instead of thepoint coordinates so thatAriane7automatically sets the reference pointat the defined vessel center of gravity;

"coef molin:" and "coef munk:": precede the definition of Munks andMolins additional moments to the yaw moment (see the theoretical man-ual for more information);

"current coefficients:": precedes the definition of the current coefficients.Three columns are necessary in the following order: Cx, Cy, Cz.

Third method Finally, the last way to define the coefficients allows the user toenter the Oil Companies International Marine Forum (OCIMF) coefficients, whichare databases of coefficients for tankers. To do this, the user needs to define the

OCIMFs parameters if needed, and click on (see fig6.37).

Figure 6.37: OCIMF Parameters

Table and graphs The coefficients table can be exported selecting the Ariane

table and pressing , then by pasting in a file ("csv", "txt", "dat" or "xls"). Thecontrary is also possible.More information on the table options are available in part Tools. In additionto the table, wind and current coefficients (as well as forces) can be displayed in agraphical way (see figure6.38) by clicking on the "Coef. graphs" tab.



101/370


Molin and Munk coefficients Molin and Munk coefficients are not necessaryfor the current coefficients definition, but will be used during the static and timedomain calculations.Please refer the Theoretical Manual for more details.

Figure 6.38: Current coefficients displayed as graphs



102/370

6-42 Vessels page

6.3.9 External loads

External loads can be defined in the vessels loading case, to take into account con-stant loads according to the vessels position in the mooring zone. The user will thenhave to specify the value of the constant load to be applied to the vessel referencepoint according to East and North coordinates.Constant loads are input in Ariane7 by the mean of a file, which format is givenin figure6.39.The input file presented in figure6.39have to contain the following keywords:

external_load: : informsAriane7that the following data concerns externalloads definition;

load labels:: precedes the definition of the different labels that will representeach of the loads defined in the file. For example if three different loads aredefined in the file, three labels have to be defined;

reference point: : precedes the definition of the vessel moment referencepoint where the external loads will be applied, in the vessel local axis system.Please note that it is also possible to write cog instead of the point coordi-nates so that Ariane7 sets automatically the vessel center of gravity as the

reference point; east positions: : precedes the enumeration of the East positions where the

external loads will be defined in the mooring zone. Combined with the Northpositions given hereafter, a grid will be drawn on the mooring zone, containingnodes on which constant loads will be defined;

north positions: : precedes the enumeration of the North positions wherethe external loads will be defined in the mooring zone;

load data: : precedes the external loads definition for each of the nodes ofthe grid. Each node has to be defined with East load (kN), North load (kN)and moment (kN.m) values (see figure6.39). The grid has the same shape asthe mooring zone: East positions are given in lines (growing from left to right)and North position are given in columns (growing from bottom to top);



103/370


104/370

6-44 Vessels page

Figure 6.40: External loads visualization

6.3.10 First order loads

This option is not available yet as it is in validation process.

6.3.11 Imposed motions

Imposed motions concern the vessels motions in time domain. With this option, it ispossible to impose the vessel motions during the simulation to study their influenceon the line loads.The file format for this option is given in figure 6.41.



105/370


Figure 6.41: Imposed motions file format



106/370


107/370


108/370

6-48 Vessels page

Separate files: clicking on in each of the loading case tab allowsthe user to export each of the loading cases individually (in different files);

Common file: clicking on exports all the defined loadingcases in the same file.

The format of the file is the same as for the input files, meaning that exported filescan be loaded again in the Ariane7interface.

6.3.15 Add loading cases to a vesselIt is possible to create different loading cases for the same vessel that will be usedas wished for the calculations. Adding a loading case is done by right clicking onthe vessel name in the tree and by selecting "Add Loading Case" (see figure 6.43).This option enables the user to use the same vessel geometry (only one vessel has tobe created) and to select which loading case corresponds to the desired calculation.

It is also possible to delete a loading case in the same manner, selecting Delete

Figure 6.43: Adding a loading case

Loading Case.

It is necessary that the user defines loading case components before performinga mooring analysis:

Static analyses: Vessels data frame, QTF, current and wind coefficients;

Time Domain Simulations: All loading case data including RAO if wavefrequency calculations are performed.

The hydrodynamic inputs correspond to one particular loading case. Changingthe vessels displacement for example needs a new definition of the loading case.



109/370

6.4 Export/import vessels 6-49

6.4 Export/import vessels

Each vessel can be saved, along with its loading cases. This can be done by rightclicking on the name of the vessel to be saved, in the tree (see figure6.44).

If the user wants to use a vessel that has alr

ariane user guide

Documents