NAME 338 , Presentation 1

Supervised by

Dr. MD. Sadiqul Baree

Professor

Department of Naval Architecture

& Marine Engineering , BUET

Designed by

Mohammad Kifayath Chowdhury

Student No: 1112023

Mahmudur Rahman

Student No: 1112049

Ship Type : Oil Tanker

DWT : 2900 tonnes

Route : Chittagong to Dhaka

Speed : 10 knots

OBJECTIVE

Principal Particulars

Length overall( LOA ): 76.2 m

Length between perpendiculars ( LBP ): 73.152 m

Moulded Breadth ( B ): 15 m

Moulded Depth ( D ): 5.94 m

Moulded Draught ( H ) : 3.96 m

Block co-efficient ( CB ) : 0.83

Frame spacing a=0.6m

Web frame spacing 𝑒 = 2.4𝑚

Material factor 𝑘 = .72 (sec 2 A.2 pg. 2-1)

General Arrangement

Drawing

Lines Plan Drawing

Scantling Calculation

&

Drawing

Scantling Calculation

Reference Rulebook: DNVGLFraming System: Longitudinal Framing

Deck Members

Deck Girder:

Section Modulus, W = c × e × l2 × P × k ( sec 10 B2.2.1)

= 0.75 × 2.4× 2.42 × 25.93 × .72

=193.566 cm3

Dimension׃ T- 180x100x8

Deck Web:

Section Modulus=c* (m2k1-m

2a)*a*l2*p*k (sec 10 B 1.1)

=.75*(1-0)*.6*22*25.93*1 (mk1,ma in pg. 12-3)

= 46.674 cm3

Dimension T 80x60x8׃

Deck longitudinal

Section Modulus=c* (m2k1-m

2a)*a*l2*p*k (sec 10 B 1.1)

=.65*(1-0)*.6*2.42*25.93*.72 (mk1,ma in pg. 12-3)

=41.94cm3

Dimension =L-80x60x7

Strength deck plating:

tmin= (4.5+.05L) (Sec 7 B 6.1)

= (4.5+.05x73.152)x mm

=6.92 mm

Taking thickness, tD = 7mm

Side Members

Side shell plate thickness

TS1 = 1.9 ×nf × a × P𝑠 ∗ 𝑘 +tk= 6.76mm (Sec-6, C.1)

Minimum Thickness = T+Cb/2 = 7.473 mm

Selected: 8 mm

Web frame ׃

Section modulus, W = 0.55 × e × l2 × P × nc × k (Ref. Sec9,B-5.3.1 pg.9-5)

= 0.55 × 2.4 × 4.942 ×27.69× 1 × .72

= 642.219 cm3

Dimension ׃T 360x190x7

Side Stringers

Section modulus, W = 0.55 × e × l2 × P × nc × k (Sec9,B-5.3.1 pg.9-5)

= 0.55 × 2.4 × 2.42 ×39.68× 1 × .72

= 217.22 cm3

Dimension ׃T 200x140x6

SIDE LONGITUDINALS

Section Modulus Wl=83/σpr((m2k1-m

2a)*a*l2* Ps (Sec 9 C3.1)

=(83/152.73)x1x.6x2.42x42.959

=80.68 cm3

Dimension ׃L 120x60x8

WEB PLATE THICKNESS:

t = 9 mm

According to table 15 (Ref. .M.M. Zulfikar (2008).The Inland Shipping Laws &

Rules,Pg144)

Shear strake:

t= 0.5(tD +tS ) (Sec 6 C.2 pg.6-5)

=0.5( 7+8) = 7.5 mm

Taking t = 8 mm

Width = 800+5L mm

=1165.76 mm

Bracket thickness:

The thickness of brackets is not to be less

than:

t = c × + tk (sec 3 B 3.5.2.2)

= 1.2 × + 1.5

=9.27 mm

≈10 mm

Bottom Members

Bottom Plate Thickness

Corrosion addition tk = 1.5 mm, for thickness ≤10 mm (Sec-3, G-1 pg.3-30)

tB1= 1.9 X nf X a X ( + tk )= 1.9x0.83x.6x +1.5=7.714mm

tB2 =1.21 x a x + tK =1.21x.6x +1.5 =6.268 mm

Minimum bottom plate thickness = c1 +tk≈ 8.75 mm

Accepted Bottom plate thickness 9 mm.

Bilge thickness

Bilge thickness = Bottom plate thickness = 9 mm

The width of bilge plate keel is not to be less than :

B= 800+5L (mm) (Sec-6, pg.6-4)

=800+5 × 73.152= 1165.76mm=1.165 m

Center Girder:

Depth, h = 350 + 45×B (Sec-8,

C- 2.2.1 pg. 8-4)

= 350 + (45×1)

= 1025mm

Double bottom depth=1000 mm

Thickness, t = ( + 1) × for h≤1200 mm (Sec-8,C-

2.2.2)

= ( + 1) ×

=9.78 mm

≈ 10 mm

Face plate width ≈ 10×10=100mm

Dimension׃ T- 1000× 100× 10

(Ref. Zulfikar.M.M. (2008).The Inland Shipping Laws & Rules, P-170)

Flat Keel Plate

The thickness of flat plate keel should not be less than

tFK = tB+2.0

(Sec-6, B 4.1 pg.6-4)

=9+2.0

=11 mm

So we take the thickness of our flat plate keel as tFK=11 mm.

The width of flat plate keel is not to be less than :

B= 800+5L (mm) (Sec-6, B 4.1 pg.6-4)

=800+5 × 73.152= 1165.76mm=1.165 m

Inner Bottom Thickness :

t= 1.1 a (p k) 0.5 + tk

(Sec-8, C.4.1)

=1.1 *0.6* (59.917*.72)0.5 + 1.5

=5.83 mm ≈ 6 mm

Bottom Side Girder:

t= * h2 / (120* ha ) (Sec-8, C.3.2pg. 8-5)

=10002/1000x120x mm

=7.07 mm

Height of double bottom=1000 mm

So. Dimension= T 1000x100x8

Bottom longitudinals

Wl=83/σpr((m2k1-m

2a)*a*l2*p

So,Putting values, Wl=82.8 cm3

Dimension ׃L 120x60x8

Floor plate:

The thickness of the plate floor tpf = tm - 2.0√𝑘 (Sec 8 C 5.2.1 pg. 8-6)

=10 – 2.0 .72= 8.3 mm

Taken thickness 9 mm.

Inner Bottom Longitudinal

Wl=83/σpr((m2k1-m

2a)*a*l2*p (Sec-4,B.5 pg. 4-5)

σpr=150/k=208.33

a=.6

Putting values, Wl=82.8 cm3

Dimension ׃ L 120x60x8

Scantling Summary

Dimension Thickness

Deck girder T 180x100x8 Strength deck plating: 7 mm

Deck web T 80x60x8 Side shell plate thickness 8 mm

Web plate thickness 9 mm

Deck longitudinals L 80x60x7 Shear strake 8 mm

Side stringer T 200x140x6 Bracket thickness 10 mm

Web frame T 360x190x7 Center Girder 10 mm

Side longitudinals L- 120x60x8 Bottom plate 9 mm

Center girder T- 1000× 100× 10 Flat Keel Plate 11 mm

Bottom Side girder T 1000x100x8 Inner Bottom Thickness 6 mm

Bottom longitudinal L- 120x60x8 Floor plate 9 mm

Bulkhead stiffener L- 40x20x6 Bilge plate thickness 9 mm

Superstrtc. Deck girder T 170x90x6 Collision Bulkhead plating 6 mm

Superstrtc. Side stringer T 120x60x8 Other Bulkhead plating 5 mm

Inner bottom longitudinal L- 120x60x8

Longitudinal Bulkhead

Plating 7 mm

Midship Section Drawing

Longitudinal Construction

Drawing

Shell Expansion Drawing

Type Number Dimension

Keel Plate 12 K1= 5000x800x11K2-K11=6000x800x11K12=5400x800x11

Bottom Plate 24 B1-B11,B13-B23=6000x2000x9B12=1460x2000x9B24=4560x2000x9

Bilge Plate 13 BL1-BL11=6000x2000x9BL12=4660x2000x9BL13=4680x2000x9

Side Shell 36 S1-S12=6000x2000x8S14-S25,S28,S30=6000x2000x8

S13=5640x2000x8S26=4250x2000x8S27=2200x2000x8S29=5000x2000x8S31=6000x1000x8S32=5000X1000X8S33=3600X1000X8S34=3100X2000X8S35=5900X2000X8

Shear Strake 13 SS2-SS12=6000X1200X8SS1=4000X1200X8SS13=4000X1200X8SS14=4280X1200X8

Plating:

Detailed LightWeight Calculation

NAME OF ITEMS WEIGHT OF ITEMS VCG about KEEL LCG about AMIDSHIP MOMENT about AMIDSHIPQUANTITY OF ITEMS MOMENT aboutt KEEL

PARALLEL MIDDLE BODY59.63 0.000512182

Deck Beam 20 3.141256 5.94 18.65906064 2.4 7.5390144

Deck Girder 4 3.35991392 5.94 19.95788868 2.4 8.063793408

Deck Longitudinal 12 7.19103528 5.94 42.71474956 2.4 17.25848467

Side Stringer 4 3.24723388 2.587 8.400594048 2.4 7.793361312

Side Longitudinal 18 7.1449389 2.587 18.48395693 2.4 17.14785336

Centre Girder 1 5.634002 0.5 2.817001 2.4 13.5216048

Side girder 4 12.292368 0.59 7.25249712 2.4 29.5016832

Bottom Longitudinal 14 5.90033664 0.06 0.354020198 2.4 14.16080794

Inner Bottom Longitudimal 12 5.90033664 0.97 5.723326541 2.4 14.16080794

Transverse Bulkhead 6 24.938508 2.97 74.06736876 2.3 57.3585684

Longitudinal Bulkhead 1 22.2286988 2.97 66.01923544 2.4 53.34887712

Bulkhead Stiffener 56 1.73615624 3.56 6.180716214 2.3 3.993159352

Web Frame 20 2.737295 2.97 8.12976615 2.4 6.569508

web floor 20 18.23712 0.57 10.3951584 2.4 43.769088

web floor stiffener 204 1.6014 0.57 0.912798 2.4 3.84336

ballast water partition 2 37.2868496 3.6 134.2326586 2.4 89.48843904

bracket 272 3.36294 3.6 12.106584 2.4 8.071056

deck plate 54.0864192 5.94 321.27333 2.4 129.8074061

keel plate 7.897 0.055 0.434335 2.4 18.9528

bottom plate 39.03 0.055 2.14665 2.4 93.672

bilge plate 38.33 0.53 20.3149 2.4 91.992

shell plate 47.6 3.6 171.36 2.4 114.24

pipes, pumps & acessories 8.5 3.4 28.9 2.4 20.4

FENDER 1.45 6 8.7 2.4 3.48

inner bottom plate 1 47.15 1.004 47.3386 2.4 113.16

TOTAL 409.9838081 1036.875195 981.293673

NAME OF ITEMS WEIGHT OF ITEMS VCG about KEEL LCG about AMIDSHIP MOMENT about AMIDSHIPQUANTITY OF ITEMSMOMENT aboutt

KEEL

ENTRANCE Anchor 1 2.9 7.8 22.62 33.6 97.44

mooring ropes 0.85 7.6 6.46 33.3 28.305

chain cable 1 2.75 7.8 21.45 32 88

stringers 0.95 3.6 3.42 30 28.5

bollard 4 0.6 8 4.8 33.6 20.16

hawse pipes 0.15 7.8 1.17 33.3 4.995

stem bar 1 1.55 6.4 9.92 38.3 59.365

forecastle deck plate 8.2 7.25 59.45 33 270.6

searchlight 1 0.1 8.85 0.885 38.3 3.83

keel plate 0.67 0.055 0.03685 28.938 19.38846

bottom plate 3.2 0.055 0.176 28.938 92.6016

bilge plate 3.23 0.53 1.7119 30 96.9

shell plate 3.48 3.6 12.528 30 104.4

pipes, pumps & acessories 1.9 3.5 6.65 28.938 54.9822

bracket 0.3 3.5 1.05 29.29 8.787

Deck Girder 4 0.87 8.9 7.743 29.29 25.4823

Deck Longitudinal 12 1.75 8.9 15.575 29.29 51.2575

Side Stringer 3 0.97 3.7 3.589 29.29 28.4113

Side Longitudinal 10 0.69 3.7 2.553 29.29 20.2101

Centre Girder 1 0.58 0.55 0.319 29.29 16.9882

Side girder 4 1.85 0.59 1.0915 29.29 54.1865

Bottom Longitudinal 12 0.89 0.06 0.0534 29.29 26.0681

Inner Bottom Longitudimal 10 0.95 0.97 0.9215 29.29 27.8255

Collision Bulkhead 1 5.73 3.96 22.6908 33.6 192.528

Wash Bulkhead 1 3.49 3.96 13.8204 35 122.15

Bulkhead Stiffener 12 1.85 4 7.4 30 55.5

Web Frame 4 0.41 2.97 1.2177 31.185 12.78585

web floor 4 2.34 0.57 1.3338 31.185 72.9729

web floor stiffener 24 0.35 0.57 0.1995 31.9 11.165

inner bottom plate 6.05 1.004 6.0742 31.96 193.358

Deck Beam 4 0.95 8.9 8.455 31.185 29.62575

TOTAL 60.55 245.36455 1918.76926


KEEL

RUNPROPELLER 1 1.9 1.28 2.432 -34.4 -65.36

PROPELLER SHAFT 1 0.95 1.27 1.2065 33.4 31.73

RUDDER & STEERING ARRANGEMENT 1 2.35 3.32 7.802 -34.793 -81.76355

ENGINE 1 4.5 1.5 6.75 -28.792 -129.564

GEAR BOX 1 1.75 1.29 2.2575 -29.9 -52.325

TRANSVERSE BULKHEAD 2 7.75 3.13 24.2575 -29.9 -231.725

Wood , Outfits & accessories 70 10.2 714 -27.7 -1939

STAIRS & RAILING 2 12.5 25 -28.5 -57

FUNNEL & MAST 1.5 14.6 21.9 -36 -54

BOLLARD & CAPSTAN 6 1 6.9 6.9 -35.96 -35.96

MOORING ROPES 1.2 6.9 8.28 -31.13 -37.356

HATCH & HATCH COAMING 2.5 6.4 16 -28.78 -71.95

Auxiliary Machinery 2.9 2.1 6.09 -26.4 -76.56

Generator 3 2.3 6.9 -26.6 -79.8

Engine Foundtion Scantling Weight 2.6 1.1 2.86 -28.153 -73.1978

Deck Beam 6 1.34 5.94 7.9596 -30.191 -40.45594

Deck Girder 4 1.4268 5.94 8.475192 -30.191 -43.0765188

Deck Longitudinal 12 2.3 5.94 13.662 -30.191 -69.4393

Side Stringer 4 1.56 2.587 4.03572 -30.191 -47.09796

Side Longitudinal 8 1.17 2.587 3.02679 -30.191 -35.32347

Centre Girder 1 1.3 0.55 0.715 -30.191 -39.2483

Side girder 4 4.24 0.59 2.5016 -30.191 -128.00984

Bottom Longitudinal 12 1.28 0.06 0.0768 -30.191 -38.64448

Inner Bottom Longitudimal 10 1.28 0.97 1.2416 -30.191 -38.64448

Bulkhead Stiffener 12 2.1 3.56 7.476 -30.191 -63.4011

Web Frame 6 1.01 2.97 2.9997 -30.191 -30.49291

web floor 6 7.12 0.55 3.916 -30.191 -214.95992

web floor stiffener 48 0.55 0.55 0.3025 -30.191 -16.60505

bracket 64 0.65 3.6 2.34 -30.191 -19.62415

deck plate 12.1 5.94 71.874 -27.2 -329.12

keel plate 1.46 0.055 0.0803 -28.193 -41.16178

bottom plate 7.84 0.055 0.4312 -30.2 -236.768

bilge plate 7.69 0.53 4.0757 -29.1 -223.779

shell plate 9.476 3.6 34.1136 -29.1 -275.7516

pipes, pumps & acessories 4.2 3.2 13.44 -35.9 -150.78

OTHERS 3.5 3.1 10.85 -34 -119

inner bottom plate 5.8 1.004 5.8232 -31.5 -182.7

Super Structure

Deck Girder 10 2.78 10.14 28.1892 -27.29 -75.8662

Deck Longitudinal 24 1.95 10.14 19.773 -27.29 -53.2155

Deck Plate 3 19.6 10.9 213.64 -26.5 -519.4

Side Stringer 8 0.982 10.4 10.2128 -32.952 -32.358864

Side Longitudinal 14 2.01 10.36 20.8236 -32.952 -66.23352

Superstructure Shell Plate 14.15 10.13 143.3395 -31.9 -451.385

FRONT &back plate 14.2 11.17 158.614 -32.5 -461.5

roof of wheel house 1 0.9 13 11.7 -27.29 -24.561

TOTAL 241.8648 1658.344102 -7022.435233


KEEL

SUMMARY

Total Light Weight 712.7 tonne

COMBINED LCG OF ALL STRUCTURES FROM AMIDSHIP -5.78661

Total Dead Weight 2900 tonne

COMBINED VCG OF ALL STRUCTURES ABOVE KEEL 4.127723

Displacement 3612.7 tonne

Deadweight Calculation

Tank Name Capacity LCG from

midship

VCG from keel

Oil Tank 1 359.4881 27.277 3.47

Oil Tank 2 485.0664 23.7 3.47

Oil Tank 3 519.456 8.4 3.47

Oil Tank 4 485.52 -0.91 3.47

Oil Tank 5 517.8701 -10.2 3.47

Oil Tank 6 522.1776 -19.85 3.47

Aft Peak Tank 11.67274 -38.663 4.802763

Fore Peak Tank 34.458 33 3.732544

Ballast Tank 1 88.02 27 0.5

Ballast Tank 2 129.7536 17.97 0.5

Ballast Tank 3 138.88 8.3 0.5

Ballast Tank 4 131.3325 -0.9 0.5

Ballast Tank 5 139.968 -10.217 0.5

Ballast Tank 6 135.8864 -19.797 0.5

LCG & VCG at Load WaterlineBALLAST WATER WEIGHT 418.5 tonnes BALLAST WATER WEIGHT

418.5tonnes

TOTAL MOMENT OF ALL BALLAST TANK ABOUT AMIDSHIP-4662.362 tonnes-

m TOTAL MOMENT OF ALL BALLAST TANK ABOUT KEEL

259.65 tonnes-m

TOTAL WEIGHT OF OIL IN ALL OIL TANKS

2427.245 tonnes

TOTAL WEIGHT OF OIL IN ALL OIL TANKS

2427.245 tonnes

TOTAL MOMENT OF ALL OIL TANK ABOUT AMIDSHIP

9575.94 tonnes-m TOTAL MOMENT OF ALL OIL TANK ABOUT KEEL

10026.84 tonnes-m

WEIGHT OF OTHER DEADWEIGHT ITEM

30 tonnes

WEIGHT OF OTHER DEADWEIGHT ITEM

30 tonnes

TOTAL MOMENT OF OTHER DEADWEIGHT ITEMS ABOUT AMIDSHIP

-1050 tonnes-m TOTAL MOMENT OF OTHER DEADWEIGHT ITEMS ABOUT AMIDSHIP

118.8 tonnes-m

TOTAL WEIGHT OF STRUCTURAL ITEMS IN THE SHIP

712.7 tonnes

TOTAL WEIGHT OF STRUCTURAL ITEMS IN THE SHIP

712.7 tonnes

TOTAL MOMENT OF STRUCTURAL ITEMS IN THE SHIP

-4122.335 tonnes-m

TOTAL MOMENT OF STRUCTURAL ITEMS IN THE SHIP

2940.54 tonnes-m

LCG OF THE WHOLE SHIP ABOUT AMIDSHIP -0.072108

m aft of amidship VCG OF THE WHOLE SHIP ABOUT KEEL 3.719 mm

Stability Calculation And GZ Curves

GZ Curve at Lightweight Condition

-1.5-1

-0.50

0.51

1.52

2.53

3.54

4.5

0 10 20 30 40 50 60 70 80 90 100

GZ

Angle

WL-1

WL-1

Angle Of Vanishing Stability 85.5 Degree

Initial GM 19.3 m

Comparison With IMO Stability Criteria

Properties IMO value WL

Area up to 30 degree (m-rad) ≥ 0.0551.9897


GZ at 30 degree (m) ≥ 0.23.4000

Max. GZ at (degree) ≥ 30 (preferable) but not ≤ 2545

GZ Curve at Ballast Condition

-2.000

-1.000

0.000

1.000

2.000

3.000

4.000

5.000

0.000 10.000 20.000 30.000 40.000 50.000 60.000 70.000 80.000 90.000 100.000

Series1

Angle Of Vanishing Stability 87 Degree

Initial GM 5.750 m

Comparison With IMO Stability Criteria

PropertiesIMO value

WL



GZ at 30 degree (m) ≥ 0.23.700

Max. GZ at (degree) ≥ 30 (preferable) but not ≤ 2539.640

GZ Curve at Full Load Condition

-1.000

-0.500

0.000

0.500

1.000

1.500

2.000

0.000 20.000 40.000 60.000 80.000 100.000

Series1

Angle Of Vanishing Stability 80 Degree

Initial GM 3.725m

IMO Stability criteria And Comparison



GZ at 30 degree (m) ≥ 0.21.650

Max. GZ at (degree) ≥ 30 (preferable) but not ≤ 2533.600

Trim Calculation

We Know That,

TRIM=(LCG-LCB)*∆ /MCT 1m

Change in Draft Aft=(L/2-CF)*Trim/L

Final Draft Aft=Draft+Change in Draft Aft

Final Draft Forward=Draft-Change in Draft Aft

Displacement 3588 tonne

LOA 76.2 m

Draft 3.96 m

LCG 0.072 m(aft)

LCB -0.816 m(fore)

MCT 1m 4932.77 tonne - m

LCF 0.046 m

Trim 0.645913756 m

Aft Trim 0.322566956 m

Fore Trim 0.213897224 m

Aft Draft 4.282566956 m

Fore draft 3.746102776 m

So the ship is trimmed by stern

Thank You…

NAME 338 , Presentation 1

Engineering

Transcript of NAME 338 , Presentation 1