ship design project and presentation by nabila naz

:

Time fora short break

1009080706050403020100

FINAL PRESENTATION

3 38 NAME

BANGLADESH UNIVERSITY OF ENGINEERING AND TECHNOLOGY COURSE NO : NAME-338 COURSE NAME : SHIP DESIGN PROJECT & PRESENTATION. PREPARED BY----- NABILA NAZ STUDENT NO. : 200812017 & MD.BARIUL KARIM STUDENT NO. :200812032 UNDER THE SUPERVISION OF ------ DR. MIR TAREQUE ALI

LEVEL - 3, TERM – 2,FINAL PRESENTATION

NAME OF THE PROJECT Design of an inland Cargo Vessel having 950 DWT cargo capacity with service speed of 10 knot

TYPE OF CARGO :Rice/paddy (bagged)with stowage factor 0.67

Proposed Route: Class-1 ( Draft-3.66-3.96m),Length-683 KmChittagong-Chowkighata-Chandpur-Shambhupura-NarayanganjDhaka-Shambhupura-Bhairab Bazar/Ashuganj;

Topics to be presented

HydrostaticScantlingGeneral arrangementLines plan

Detailed weight calculationResistance & engine power

Propeller blade & shaftStability & trimRudder

INTRODUCTION TO THE BASIS

SHIP DWT 800

LBP 42.50

L/B 4.6096

B/T 2.535

B/D 2.286

Split picture

Comparison between Basis & Designed Ship

Basis ShipCargo capacity=800

ton

LBP=42.5mB=9.22mD=4.03m

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Preliminary General Arrangement

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Preliminary Lines PlanPreliminary Offset table

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DraughtAW (m^2)

Displacement ∆ (Tonne) KB (m)

KML (m)

KM t (m) CB CM CP LCF TPC

MCTC 1m Cw

0 0 0 0 0 0 0 0 0 00.35 263.83 52.63 0.49 457.62 34.4 0.34 0.54 0.53 -0.59 2.64 446.32 0.6

0.7 306.07 158.82 0.63 288.73 33.07 0.52 0.79 0.66 -0.56 3.07 633.03 0.691.05 331.57 267.92 0.78 250.43 9.14 0.58 0.84 0.69 -0.51 3.31 762.14 0.75

1.4 348.17 389.89 0.96 150.62 7.89 0.64 0.89 0.72 -0.45 3.48 890.03 0.791.75 363.32 508.44 1 87.69 7.06 0.66 0.9 0.73 -0.36 3.63 979.47 0.82

2.1 370.71 640.24 1.2 73.7 5.36 0.69 0.92 0.75 -0.15 3.7 1071.3 0.862.45 378.28 767.66 1.4 70.66 4.97 0.72 0.93 0.78 0.37 3.82 1181.55 0.88

2.8 396.2 909.31 1.56 79 4.64 0.74 0.94 0.79 0.55 3.96 1261.56 0.93.15 402.2 1046.64 1.75 58.2 4.5 0.76 0.95 0.8 0.613 4.02 1312.74 0.92

3.5 406.57 1190.66 1.93 52.98 4.4 0.78 0.96 0.81 0.63 4.06 1350.77 0.933.85 410.32 1275.84 2.2 51.01 4.53 0.82 0.97 0.83 0.631 4.1 1383.99 0.93

PRELIMINARYHYDROSTATIC PARTICULARS

Preliminary resistancesFRICTIONAL RESISTANCE , RF

42.06 KN

RESISTANCE OF APPENDAGES , RApp

0.481 KN

WAVE MAKING AND WAVE BREAKING RESISTANCE , RW

30.64 KN

MODEL SHIP CORRELATION RESISTANCE , RA

05.85 KN

TOTAL RESISTANCE, RT

79.98 KN

PE=411.9 KW

Pd=564.25 KW

Ps=570 KW

Pb=587 KW

Power

&

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Selected engineMODEL 6AYM-WGT L-rating

Number of cylinder 6

Arrangement In-Line type

Rated speed 1938 rpm

Fuel consumption at nominal rating 60 L /h(at Avrg SP)

Displacement 20.379

Width 1590 mm

Height 4008 mm

Average weight of engine ready for installation (dry) 2365 kg

Selection

of blade &Gear

box

Propeller

power

Determination of

dia

Optimization of

dia & pitch

Checking cavitation

Why 4 blade?Why 4 blade?

Number of blade chosen: 4Number of blade chosen: 4Efficiency

Number of blade

Create more total blade area with same or less dia

Efficiency as nearly as 3 bladed propeller

Better low speed handling & reduce vibration

Propeller power / Developed power:

Developed power= Total effective power/ QPCQPC= η o* η r*(1-t)/(1-wt)* η s Assuming,Do=60%T ηo =0.475 ηr=1.05 t=0.267 wt=0.282 ηh=1.02 ηs =0.98 QPC=0.5011

So,Pd=585KW

Slip=1.4/(V^0.057)

=1.23Wake factor, For slip

<2.5Single

Screw ,Wf

= 1.21 – (0.6XCb)=0.718

Speed of Advance

Va=VX Wf=10*0.618=7.18

knotsTaylor Wake Fract

ion , Wt =(V-

Va) /V=0.282

Marine Analyst Service Handbook

Torque i.e deliver more thrust Shaft RPM

Selected Engine’s RPM is 1938 RPM

Specified gear box with Main Engine

So, we need to use a Reduction gear box .

MODEL YXH-180

TYPE HYDRAULIC MULTI DISC

CLUTCH

REDUCTION RATIO

(ahead)

1.95 2.27 2.56 3.03 3.48 4.99

5.36

DRY WEIGHT

645 KG

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Gear ratio RPM Bp δ ηo

1.95 993.8462 197.903 828.3222 0.429

2.27 853.7445 170.0048 711.5543 0.431

2.56 757.0313 150.7464 630.9486 0.433

3.03 639.604 127.3633 533.0787 0.453

3.48 556.8966 110.8939 464.1461 0.468

4.99 388.3768 77.33685 323.693 0.475

5.36 361.5672 71.9983 301.3486 0.462

Assuming Do=60% of draft

Shaft RPM =(1938/4.99)=388 rpm

Bp=77.23Po/Do=0.5524 δ0=340 η0=0.475

δ0=3.28*(N*Do)/Va, Do=1.92 m Po/Do=0.5524, Po=1.061 m

The dia Db in the behind condition is about 5% less than Do, Db=1.92*0.95=1.824 m

For optimum efficiency using B 4.55 BP-δ chart:(blade no-4, Ae/Ao=0.55)

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150 200 250 300 350 400 450 500 550 600 6500

100200300400500600700800900

585

Influence of diameter & pitch

Power &Speed graph for fixed dia 1.824 m& different pitch

Power & speed Diagram for fixed pitch 1.157 m& different dia

Propeller RPM

Deve

lope

d po

wer

(KW

)

From the two curves get optimum RPM= 386.364& Pd=585 KWWhich are very close to our calculated value.

So, estimated diameter & pitch will not reduce propulsive efficiency

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CHECKING FOR CAVITATIONPB+DB=Po+Do, PB=1.157 m, ,h

=4.2 m

Po-Pu=99.66+10.1h=142.416kPa

qT=.5*ρ*V20.7R=351.

819kp

V20.7R=Va2+(0.7*π*

n*Do)2

δ= Po-Pu/ qT=0.405 T=( PB* η0* ηR) /

Va =55.11 ηR=o.73, η0=0.475

using Burril’s Cavitations Chart:

г =(T/Ap)/qT=0.144,

Ap=1.088

Ap/ Ad=1.067-0.229*(P/D)=0.921

8, Ad=1.18To avoid

cavitations minimum BAR= Ad/

AB=1.18/ π/4*(1.824)

2=0.4516

As we assume BAR 0.55

So , Cavitation

will not occur

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No of blade 4

Type B-series

Blade dia 1.824m

Blade Area ratio 0.55

Pitch (fixed) 1.157

Pitch dia ratio 0.634

Gear box reduction ratio 5:1

Rake at tip 0.00

Direction of rotation RH & LH

Estimated Weight 673 kg

Shafting arrangement

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Society of Automotive Engineers (SAE) dimension

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Gland housingNeck bearingShaft bearing

PackingCoupling

Securing screw

Shaft dia 140 mm

Coupling key

Stern tube

Cone nut

Gland nut

Cone nut

Washer

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Propeller key

Thread

Lock nut

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X = 5~10% D,But we get=0.166 m(9%)Z = Up to 5% D=0.043m (2.35%)Y = 15~25% D,But we get=0.207 m(11.35%)Min Tip clearance,c=(0.065*√L-0.12)=0.316 m, but we get =0.216 m

Satisfied

Needsupdate

CLEARANCE REQUIREMENT

11.35%

11.35%

2.35%

9%

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0.316 m

Final sheer forward=1.25 m& bow height =2.38 m (BV rule)

Picture capon

Final sheer aftward=0.641 m

Update of General Arrangement

Update of Lines Plan

Update of Hydrostatic Calculation

Update of Resistance & Power Calculation

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Final General Arrangement Drawing

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Final Offset Table

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DraughtAW (m^2)

Displacement ∆ (Tonne) KB (m)

KML (m)

KM t (m) CB CM CP LCF TPC

MCTC 1m Cw

0 0 0 0 0 0 0 0 0 00.35 263.83 52.63 0.29 381.62 30.4 0.34 0.54 0.53 -0.59 2.64 446.32 0.6

0.7 306.07 158.82 0.43 179.8 13.07 0.52 0.79 0.66 -0.56 3.07 633.03 0.691.05 331.57 267.92 0.62 128.63 9.14 0.58 0.84 0.69 -0.51 3.31 762.14 0.75

1.4 348.17 389.89 0.8 103.52 6.89 0.64 0.89 0.72 -0.45 3.48 890.03 0.791.75 363.32 508.44 1 87.69 6.06 0.66 0.9 0.73 -0.36 3.63 979.47 0.82

2.1 370.71 640.24 1.2 73.7 5.36 0.69 0.92 0.75 -0.15 3.7 1071.3 0.862.45 378.28 767.66 1.4 70.66 4.97 0.72 0.93 0.78 0.37 3.82 1181.55 0.88

2.8 396.2 909.31 1.56 64 4.64 0.74 0.94 0.79 0.55 3.96 1261.56 0.93.15 402.2 1046.64 1.75 58.2 4.5 0.76 0.95 0.8 0.613 4.02 1312.74 0.92

3.5 406.57 1190.66 1.93 52.98 4.4 0.78 0.96 0.81 0.63 4.06 1350.77 0.933.85 410.32 1275.84 2.2 51.01 4.53 0.82 0.97 0.83 0.631 4.1 1383.99 0.93

FINALHYDROSTATIC PARTICULARS

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00.5

11.5

22.5

33.5

44.5

DRAFT

DRAFT

VOLUME DISPLACEMENT

0 0.5 1 1.5 2 2.50

0.5

1

1.5

2

2.5

3

3.5

4

4.5DRAFT

DRAFT

KB0 50 100 150 200 250 300 350 400 450

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

DRAFT

DRAFT

AW

FINALHYDROSTATIC CURVES

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-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.80

0.5

1

1.5

2

2.5

3

3.5

4

4.5

DRAFT

DRAFT

LCF0 50 100 150 200 250 300 350 400 450

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

DRAFT

DRAFT

KML0 5 10 15 20 25 30 35

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5DRAFT

DRAFT

KMt


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0 0.5 1 1.5 2 2.5 3 3.5 4 4.50

0.5

1

1.5

2

2.5

3

3.5

4

4.5

DRAFT

DRAFT

TPC0 200 400 600 800 1000 1200 1400 1600

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

DRAFT

DRAFT

MCT 1m


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Final hydrostatic curves

0 0.5 1 1.5 2 2.5 3 3.5 4 4.50

0.2

0.4

0.6

0.8

1

1.2

0.93

0.830000000000001

0.970000000000001

0.820000000000001

Hydrostatic form curves

CBCMCPCw

Draft

Form

coe

ffici

ents

RESISTANCE VALUE

FRICTIONAL RESISTANCE , RF 18.02 KN

1+K1 1.55RESISTANCE OF APPENDAGES , RApp 0.541 KN

WAVE MAKING AND WAVE BREAKING RESISTANCE , RW`

10.43KN

MODEL SHIP CORRELATION RESISTANCE , RA

6.29 KN

TOTAL RESISTANCE, RT 45.19 KN

{RT =RF(1+K1) +RAPP+RW+RB+RTR+RA}

Final Resistance calculation

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Resistance(total) 45.18522 KN

Power(effective) 232.703883 KW nd (QPC) 0.50462707

Delivered, Pd 461.140306 KW

Shaft power, Ps 468.162747 KW

Brake power, Pb 487.669528 KWMCR 85% 573.728857 KW

P=RXVPd=P/nd

nd=0.84-N√L/100

0

Ps=Pd/ηt ηt=0.985

Updated power calculation

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Item Al (m^2) Af (m^2)Hull 17.1 3.71Solid railing 29.0 9.761st deck 24.0 19.522nd deck 13.8 15.6Wheel house 5.51 14.63Funnel 3.45 3.45

92.8562 66.6468

AIR RESISTANCE

Air Resistance= 11.467KNPower = 59.05 KW

Resistance vs. speed graph

4 4.5 5 5.5 6 6.50

102030405060708090

100

Speed (m/s)

Resi

stan

ce (K

N)

V(m/s)R Total(KN)

R water(KN)

R air(KN)

4.12 34.642 24.01 10.12

4.63 44.36 33.6 10.79

5.15 56.66 45.19 11.47

5.66 80.57 68.4 12.17

6.18 92.57 79.68 12.89

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V(m/s) Pt(KW) Pw(KW) Pa(KW)

4.12 287.7 243.91 41.69

4.63 433.462 383.502 49.96

5.15 632.8 573.73 59.07

5.661023.384 954.504 68.88

6.18 1293.72 1214.06 79.66

Total Power vs. Speed Graph

4 4.5 5 5.5 6 6.50

200

400

600

800

1000

1200

1400

Speed (m/s)

Pow

er(K

W)

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Previous Power

587 KWAs we selected engine of 670 KW, so no update is necessary for:1.Engine & Gear box selection2.Propeller blade design3.Propeller Shafting arrangement

•••••••••••••••••••••••••••••••••• Scantling

FRAMING INFORMATIONFraming System Transverse

Frame Spacing (midship) 550mm

Frame Spacing (for& aft) 500mm

No. of Main Frames 80

No. of Web Frames 17

No. of Bulkheads 4

Shell StructurePlates Thickness

Keel Plate 10mm

Bottom Plate 8mm

Bilge Plate 9mm

Shell Plate 8mm

Bottom Single BottomCenter Keelson T-513X230X10Side Keelson T-470X8+129X10Floor plates T-492X125X10Web Frame L-160X80X12Main Frame L-100X65X7Side Frame L-75X75X8Transverse Deck Beam 100X65X7Main deck plate 7mmMain deck longitudinal L-100X65X7Side Stringer L-160X80X12

Bracket 300X300X7

Hatchway Beam 80X65X7

Hatch Coaming Height 1000mm

Framing& Continuous Items Using G.L& NK RULE BOOK 08

Scantlinng of DeckhousesPoop deck plate 6mm

Poop deck Beam 90X65X7

Poop deck longitudinal 90X65X7

Poop deck Side Wall 8mm

Navigation deck plate 5mm

Navigation deck longitudinal 60X60X6

Navigation deck Side Wall 4mm

Navigation deck Rail Height 1000mm

Roof beam 50X50X5

Roof girder 50X50X5

Roof Rail Height 350mm

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LONGITUDINAL CONSTRUCTION

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SHELL EXPANSION ( PREVIOUS & UPDATED)

Keel plate

•No:12•Weight-7.56 tons

Bottom plate

•No:16•Weight-22.2 tons

Bilge plate

•No:9•Weight-9.58tons

Shell plate

•No:38•Weight-33.95tons

Keel plate(m^3)

No:12

K1=4.136*.531*.010

K2=4.265*.531*.010

K3=3.676*.531*.010

K4=3.090*.531*.010

K5-10=6.000*.531*.010

K11=4.091*.531*.010

K12=5.264*.531*.010

Bottom plate(m^3)

(Strake-A)

No:16

BT1=3.283*1.019*8

BT2=6.091*1.631*8

BT3-5=6.000*1632*8

BT6=9.285m^2*8

BT 7=6.835m^2*8

BT8=1.14m^2*8

BT8=

BT9=3.164m^2*8

BT10=10.8m^2*8

BT11-14=6.000*1.796*8

BT15=10.756m^2*8

BT16=8.85m^2*8

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Bilge plate(m^3)

No:9

BG1=1.79m^2*0.009

BG2=9.08m^2*0.009

BG3-7=6.000*1.500*0.009

BG8=9.04m^2*0.009

BG9=2.92m^2*0.009

Shell plate(m^3)

(Strake-A)

No:38

SH1=8.519m^2*8

SH2=9.03m^2*8

SH3-6=6.000*1.500*8

SH7=4.512m^2*8

SH8=7.79m^2*8

BT8=

SH9=5.78m^2*8

SH10=9.05m^2*8

SH11=9.01*1.796*8

SH12-14=6.000*1.500*8

SH15=8.10m^2*8

SH16=8.56m^2*8

SH17=4.36m^2*8

(Strake-C)

SH18=1.43m^2*8

SH19=11.5m^2*8

SH20=11.4m^2*8

SH21=7.71m^2*8

SH22-23=6.0*1.52*8

SH24=5.17m^2*8

SH25=4.76m^2*8

SH26-38=35.83m^2*8

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Engine foundationPrevious one Updated one

Foundation Detail

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RUDDER DESIGN

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Rudder stock 110 mm dia Cast IronRudder plate 8 mm thk Cast Iron

coupling 300mm dia Cast Iron

Coupling bolts 25 mm dia Cast Iron

sleeve 152 mm dia outer, 21mm thk BrassBush 192 mm dia outer,20 mm thk Mild Steel

Bearing housing od 230 mm dia Cast Ironpintle 160 mm dia Cast Iron

Pintle bearing 120 mm dia Cast Iron

Sole piece 430X77 Cast Iron

Doubler plate at tiller 300X8 Cast Iron

DETAILED WEIGHT

CALCULATION

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Total weight of all continuous

members=39.99 tons

Keelsons=36.05 tons

Main&forecastle deck

girders=1.67tons

Side stringers=1.1

2tons

Superstructure deck

longitudinal& girders=1.15tons

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Total weight of all framing

items=87.91 tons

Main&Web frame=13.557t

onsMain&&

F’castle deck beam=5.583to

ns

Floors=58.62 tons

Bulkheads=9.12 tons

Brackets& BHD stiffeners=1.03

tons

Superstructure deck

beams=4.86 tonsWall

stiffener=6.17 tons

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Weight of engine foundation=1.241 tons

Face plate=0.427tons Stiffeners=0.67 tonsEngine&Gear box

foundation plates=0.144tons

Total steel weight=39.99+87.91+194.171+1.241 =323.312 tons

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QUIPMENT NO=CB*L*B*D=1458

• Weight of anchors=1.8tons

Other items=12.74 tons

Rudder stock,plate

0.482 tons

Coupling 0.02 tonsSleeve,bush 0.0078 tonsPintle,bearing 0.546 tonsSteering rod 0.00246 tonsDoubler plate&tiller

0.26 tons

Hatch cover 11.19 tonsHatch cover stiffener 7.7 tonsHatch way beam 0.4 tons

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Machinery Weight = 5 ton

Propelling machinery weight,

Engine=2.365 tonGear box=0.645 ton

Auxiliary machinery weight=2.0 ton

Weightof fuel =6.0ton

Wight of fresh water=5ton

Lightweight=352 ton

Deadweight=961 ton

Total weight=1313 ton

Volume CalculationCargo holds VolumeHold 1 700 m^3Hold 2 709 m^3

Stowage factor:(Rice-paddy-rough) bagged -0.64-0.67

Hold capacity (700+709)/0.67=950.71tons

Hence,our requirement has been satisfied

TOTAL WEIGHT =1313 TONDISPLACEMENT=1387 TONTotal weight < Displacement

So,we will use FPT & APTTanks CapacityFPT 100 ton APT 92 ton

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HULL outfitLCG=2.69m aft fromamidshipVCG=4.5 from

KEEL

SuperstructureLCG=18.6m aft fromamidshipVCG=6.5 from

KEEL

MachineryLCG=9.13m aftVCG=2.4 from

KEEL

STABILITY &

TRIM

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0 10 20 30 40 50 60 70 80 90 100

-1

-0.5

0

0.5

1

1.5

2

2.5

3

Seri...

Angle(deg.) GZ(m)

0 015 1.09833730 2.4871145 2.56758360 0.63005975 -0.1791890 -0.52062

GRAPICAL ANALYSIS OF GZ CURVE

• 1. Fully loaded condition (Draft-3.85 m)

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• 1. Half loaded condition (Draft-2.10 m)

Serial no.

Angle(deg.) GZ(m)

1. 0 02. 15 1.7624183. 30

3.770114. 45

4.3820525. 60

2.8522926. 75

2.2993897. 90

2.0453750 10 20 30 40 50 60 70 80 90 100

00.5

11.5

22.5

33.5

44.5

5 GZ(m)

GZ(m)

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0 10 20 30 40 50 60 70 80 90 1000

0.20.40.60.8

11.21.41.61.8

2

3.Unloaded Condition (Draft-1.30 m)

Angle of heel(deg) GZ(m)

0 0

15 0.30107865730 1.8062196645 1.5432160 0.97041497875 0.76403170890 0.34578

COMPARISON WITH IMO 167 REGULATION FOR STABILITY CRITERIA

(Full loaded condition)

CRITERIA REQUIRED OBTAINED

AREA FROM 0 TO 30 DEGREE

0.055 m.rad(minm) 0.66m.rad


0.09 m.rad(minm) 0.726m.rad


0.03 m.rad(minm) 0.456 m.rad

GZ AT 30 DEGREE 0.2 m(minm) 2.49 m

ANGLE OF MAXIMMUM GZ

≥ 30 degree 45 degree

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LOA 52.42 m

Draft 3.85 m

LCG 3.28 m Aft

LCB 3.16 m Aft

MCT 1m 1383.99 tons.m/m

CF 0.631 m aft

Trim 0.123989335 m

Aft Trim 0.06050216 m

Fore Trim 0.063487176 m

Aft Draft 3.91050216 m

Fore Draft 3.786512824 m

Trim CalculationTrim = (LCG – LCB)×∆/MCT 1mChange in Draft Aft = (L/2 – CF)×Trim/LFinal Draft Aft = Draft + Change in Draft AftFinal Draft Forward = Draft – Change in Draft Aft

Fully Loaded Condition

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LOA 42.571 m

Draft 1.3 m

LCG 5.774402 m Aft

LCB 4.539 m Aft


CF -1.875 m Fore

Trim 0.650993 m

Aft Trim 0.354169 m

Fore Trim 0.296824 m

Aft Draft 1.654169 m


LOA 44.172 m

Draft 2.1 m

LCG 2.26661 m Aft

LCB 1.539 m Aft


CF -1.2 m Aft

Trim 0.64488 m

Aft Trim 0.33996 m

Fore Trim 0.30492 m

Aft Draft 2.43996 m


Unloaded Condition Half Loaded Condition

Trim Calculation

Fully loaded=3.85m (draft)

• Trim=0.124 m• Final draft aft=3.91 m• Final draft fwd=3.78 m

Half loaded=2.10m (draft)

• Trim=0.645 m• Final draft aft=2.44 m• Final draft fwd=1.78 m

Unloaded=1.30m(draft)

•Trim=0.651 m•Final draft aft=1.654 m•Final draft fwd=1.003 m

Model Representation

ship design project and presentation by nabila naz

Documents