midas fea v320 - cspfea · midas fea v320 table of contents new feature 01 cfd moving mesh pre...

MIDAS Information Technology Co., Ltd. 2011.3.25

midas FEA V320

Table of Contents

New Feature

01 CFD Moving Mesh

Pre Process

01 File Open > File Preview

02 Extract Surface

03 Frame to Solid > Import

04 Tetra Auto mesh generation

05 Mesh options

06 Auto mesh Solid Function options

07 Protrude Mesh > Element Edge2D Mesh

08 Seeding definition

09 Mass Center > Node

10 Nonlinear Point spring

11 Tapered Beam > Section Template

Post Process

01 Quarter Mirror Mode

02 Combination/Envelop Results

03 Reaction Result Summations

04 Reinforcement Post Mesh Set

05 Heat of Hydration Result

Bug Fix List

MIDAS Information Technology Co., Ltd.

Advanced Nonlinear and

Detail Analysis System

1/23

New Feature

(1) CFD Moving Mesh

Time Step 200

Time Step 400Time Step 600

• FEA now supports ALE(Arbitrary Lagrangian-Eulerian) technique using FSI(Fluid-Structure Interaction) analysis

• Stiffness (per unit span) considering the stiffness and mass matrix can also consider both modal and

structural damping.

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•Predict fluid and structural interaction behavior.

•Compute fluttering coefficients by performing buffeting and fluttering analysis.

Effects & Usage




2/23 2

Pre Process – File open

•A new preview window displays information about the model pertaining to the number

of elements, nodes, and available results.

• 현재모델의 요소와 절점수를 바로 표현해 주는 기능 지원

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•This new feature allows users to quickly recognize files that have been completed

or in progress.

Effects & Usage

(1) File Preview Window & Status Bar

Number of Nodes and Elements

for Current Model




3/23 3

Pre Process - Geometry

(2) Extract SurfaceExtract Surface

Surface Automesh

• Easy to use function to extract surfaces from solids.

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• This is a convenient feature which allows users to generate shell elements on top of solid elements.

Effects & Usage




4/23 4

Pre Process - Geometry

(3) Enhanced Frame to Solid

•Enhanced Frame to Solid engine to import frame sections from Midas/Civil into FEA as geometry solids.

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• This enhancement allows easy import of tapered cross sections.

Effects & Usage

Midas/Civil

Geometry Solid

Automesh




5/23 5

Pre Process – Mesh (1)

(4) Performance & GUI

Simplify GUI

Simplify GUI

•Up to 50% increase in Tetra Automesh generation.

•Separate Advanced option button includes Mesh Window and options.

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• Increase in meshing speeds can reduce modeling time.

• Separate meshing window allows users to easily navigate and select options.

Effects & Usage




6/23 6


(5) Meshing

Previous

Align Edge

• Align Edge seed near inner loop option.

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• Improve element mesh and result accuracy for objects with void sections.

Effects & Usage




7/23 7


(6) Add Options in Automesh Solid Function

If the geometry shape is feasible for

mapped mesh, try to execute it.

After automeshing, execute

remeshing to attain high mesh

quality.

Even if some parts fail to mesh,

try to execute mesh for all parts.

•Remesh and Map mesh options integrated into auto-mesh function.

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•These options can reduce the number of elements generated, increase analysis speeds by generating

higher mesh quality and improve overall accuracy of results.

Effects & Usage




8/23 8


(7) Prutrude mesh (Extrude, Revolve, Sweep, Project, Offset, Fill)

• Uniform and non-uniform options can now control element’s length and division.

• Option to generate 2D elements directly from Element Edge.

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• Provide detail meshing tools for higher and more control over mesh generation.

• Geometry edges and also element edges can be extruded to generate 2D elements.

Effects & Usage




9/23 9


(8) Seeding & Measure

Default seeds

showing numbers

Seeds adopting even

number option

Add Mass and Weight

• Seeding Option includes “Even Number of Seeds.”

• Measure Elements includes measure of Mass and Weight for 2D and 3D elements.

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• Conveniently generate mapped mesh elements by considering even number of seeds.

• Easily obtain information about the mass and weight for 2D and 3D elements.

Effects & Usage




10/2310


(9) Create Node

Creating node at mass center

• New option to define nodes based on the center of mass summation.

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• Easily impose concentrated loads or model rigid links at the Mass Center.

Effects & Usage




11/2311

Pre Process – Analysis>Property

(10) Nonlinear Point Spring

• Describe nonlinear point spring behavior using nonlinear elastic type.

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•Capture various type of nonlinear behavior using Point Spring.

Effects & Usage




12/2312

• Tapered Beam with Section TemplateUpgrade Contents

• From Tapered Beam, input characteristics include Section-i and Section-j cross section

• Easy input and visual representation considering cross characteristics.

Effects & Usage

(11) Tapered Beam: Section Template

Pre Process – Analysis>Property




13/2313

Post Process – Mirror Plane

(1) Quarter Mirror Mode in Post Processor

• 1/4 of a model can now be mirrored to display full model and corresponding results.

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• The mirror option saves time by allowing users to present symmetric or full model

with corresponding results from quarter of a model.

Effects & Usage




14/2314

Post Process

(2) Combination/Envelope Results

• New feature which can consider linear and moving loads as combinations with option to scale.

• Load combinations for both linear and envelope can be assigned with Max, Min, and Absolute.

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• Users can now study behavior due to load combinations.

• Increase post processor result extraction by assigning specific Max, Min, and Absolute definitions.

Effects & Usage




15/2315

Post Process

(3) Summation for Reactions

• (3) New function to calculate the summation of reactions.

• (4) Reinforcement tendon results are now displayed for each and every tendon mesh set.

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• (3) Ability to ensure and verify results by inspecting the reaction forces.

• (4) Easy viewing of results for reinforcement tendon.

Effects & Usage

(4) Reinforcement Post mesh Set

Distinguishes all pre

mesh sets as individual

post mesh sets

One post mesh

set Created




16/2316

Post Process

(5) Hydration Result in element

•Node & Stress Component results for Allowable Stress and Crack Ratio can be extracted

from node to element level. (Nodal Average checked off for Element)

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• Output results to the post processor at the element level.

• Averaged crack ratio and tensile strength at discontinuity Averaging.

Effects & Usage

Nodal Average Result Element Result

Crack Ratio(Normal)




17/2317

Bug Fix List – Pre/Post

(1) 3D Dxf import engine

Known Issue

- Misinterpretation and errors occurred when importing 1D lines from

CAD 3D dxf files.

(2) Saving model files that contains Arbitrary load assignment

- Arbitrary load assignments after saving and renaming model file

produced different results prior to saving the model file under

different name with the same arbitrary load.

Rename

- Modified arbitrary load assignment.

● File > import > Dxf 3D…

● File > import > Advanced Geometry > DWG/DXF…

Related Functions

Resolved

- Improved import 3D dxf engine.

● Analysis > Load > Arbitrary Load

Related Functions

Known Issue




18/2318


(3) Error when interpreting shell to solid.

- Misinterpretation of shell from small sized solid geometry.

(4) Pre-Neutral Import Error

- Error occurs when importing pre-Neutral files.

Resolved

- Modified pre-neutral format to correctly register during import.

● Geometry > Solid > Shell -> Solid

Related Functions

Resolved

- Small sized solid geometry can correctly interpret shell shapes.

● File > Import > Pre-Neutral (FEA)

Related Functions

Known Issue

Known Issue




19/2319


(5) Error in Batch Analysis for model files containing reinforcements

-Error occurs when performing batch analysis for models containing

reinforcements requested input command.

(6) Stress Linearization for Axisymmetric unable to consider step operations

- Unable to introduce steps when performing stress Linearization for

Axisymmetric models.

Resolved

- Modified Analysis Case to introduce steps when defined by user.

● Analysis > Batch Analysis

Related Functions

Resolved

- Modified batch analysis for model files containing reinforcements.

● Post > Stress Linearization for Axisymmetric

Related Functions

Known Issue

Known Issue




20/2320


(7) Error in graph out for Time History Analysis

- Results displayed in output graph returns zero values for Time History

Analysis.

(8) Erroneous results extracted from Coordinates & Mesh using Local Direction Force Sum

- Incorrect results from Auto-mesh and Map-meshed elements when

using Local Direction Force Sum.

Resolved

- Modified Cutting Line in Local Direction Force Sum function.

● Post > Time History Analysis > Time History Graph

Related Functions

Resolved

-Results displayed in output graph register correctly for Time History

Analysis.

● Post > Local Direction Force Sum

Related Functions

Known Issue

Known Issue




21/2321

Bug Fix List - Analysis

(9) Error in Subspace and Lanczos Type when performing Eigenvalue analysis.

- Errors found in subspace and Lanczos type.

(10) Error in elastic link elements results in Time History/Eignenvalue analysis

- When performing Time History/Eigenvalue analysis, elastic link

elements exhibited non-linear behavior.

Resolved

- Modified iterative method to govern only linear behavior for elastic

link elements.

● Analysis Case > Analysis Control > Eigenvector Type

Related Functions

Resolved

- Modified Eigenvalue analysis to register both subspace and Lanczos

type.

Related Functions

Known Issue

Known Issue




22/2322


(11) Error in Response Spectrum analysis when considering reinforcements.

- Solver failed to perform analysis for response spectrum analysis that

include reinforcement.

(12) Erroneous Reinforcement behavior in Time History analysis

- Reinforcements did not exhibit any changes in stiffness.

Resolved

- Modified Time History and reinforcement functions to consider

stiffness variation.

● Analysis > Analysis Case > Response Spectrum

Related Functions

Resolved

- Modified solver routine.

● Analysis > Analysis Case > Time History

Related Functions

Known Issue

Known Issue




23/2323


(13) User Defined Load Step error for load step factor

- User Defined Load Step introducing load step factors other than value

‘1’ registered incorrect load step factors in subsequent construction

stages.

(14) Incorrect allowable stress calculations when user defined material is used in Heat of Hydration analysis

- User defined material used in heat of hydration analysis did not

update age values.

Resolved

- Age values correctly updated when user defined material is considered

in heat of hydration analysis.

● Analysis > Analysis Case > Construction Stage

Related Functions

Resolved

- Load factors and forces transfer correctly over to subsequent stages.

● Analysis > Analysis Case > Heat of Hydration

Related Functions

Known Issue

Known Issue

midas fea v320 - cspfea · midas fea v320 table of contents new feature 01 cfd moving mesh pre...

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