STARTINGSTARTING

IN THE NAME OF ALLAHIN THE NAME OF ALLAH

WHO IS WHO IS

MOST BENEFICENT MOST BENEFICENT

AND AND

MOST MERCIFULMOST MERCIFUL

NAME 338NAME 338SHIP DESIGN PROJECT AND SHIP DESIGN PROJECT AND

PRESENTATIONPRESENTATION►COURCE TEACHER:COURCE TEACHER:

PROFESSOR KHABIRUL HAQUE PROFESSOR KHABIRUL HAQUE CHOWDHURYCHOWDHURY

STUDENTS:STUDENTS:

MD. AL- AMIN PAVELMD. AL- AMIN PAVEL

MD. IKRAM HUSSAIN TALUKDARMD. IKRAM HUSSAIN TALUKDAR

OUR PROJECTOUR PROJECT

►TYPE OF SHIP: PASSENGER VESSELTYPE OF SHIP: PASSENGER VESSEL►ROUTE: DHAKA-CHANDPUR-BARISALROUTE: DHAKA-CHANDPUR-BARISAL

Principal ParticularsPrincipal Particulars► EXISTING:EXISTING:

LLOAOA=46.61m=46.61mBreadth:8.53mBreadth:8.53mDepth:2.44mDepth:2.44mDraught:1mDraught:1m

PROPOSED:PROPOSED:

LLOAOA=71m=71mBreadth:12.8mBreadth:12.8mDepth:3.71mDepth:3.71mDraught:1.3mDraught:1.3m

GENERAL ARRANGEMENTGENERAL ARRANGEMENT

LINES PLANLINES PLAN

b 1b 2b 3b 4b 5b 6

WL5

WL4

WL3

WL2

WL1

b 1 b 2 b 3 b 4 b 5 b 6

st 1st 2st 3st 4st 5st 6st 7st 8st 9st 10st 11st 12st 13st 14st 15st 16st 17st 18st 19st 20

b 1

b 2

b 3

b 4

b 5

b 6

st 1st 2st 3st 4st 5st 6st 7st 8st 9st 10st 11st 12st 13st 14st 15st 16st 17st 18st 19st 20

wl 1wl 2wl 3wl 4wl 5wl 6

WL5

WL4

WL3

WL2

WL1

B1 B2 B3 B4 B5 B6

B6

B5

B4

B3

B2

B1

S20 s19 s18 s17 s16 s15 s14 s13 s12 s11 s10 s9 s8 s7 s6 s5 s4 s3 s2 s1

S20 s19 s18 s17 s16 s15 s14 s13 s12 s11 s10 s9 s8 s7 s6 s5 s4 s3 s2 s1

OFFSET TABLEOFFSET TABLEOFFSET TABLE

ALL DISTANCE ARE IN METER

LONG. POSITION STATION WL-1 WL-2 WL-3 WL-4 WL-52.913 S-1 - 5.413 5.957 6.143 6.3066.314 S-2 5.831 6.234 6.32 6.38 6.4199.715 S-3 6.192 6.363 6.393 6.411 6.426

13.116 S-4 6.196 6.349 6.38 6.402 6.42116.517 S-5 6.203 6.343 6.371 6.394 6.41719.918 S-6 6.212 6.34 6.363 6.387 6.41223.319 S-7 6.22 6.338 6.356 6.38 6.40826.72 S-8 6.197 6.323 6.343 6.37 6.402

30.121 S-9 6.13 6.288 6.321 6.356 6.39333.522 S-10 6.015 6.233 6.291 6.339 6.38336.924 S-11 5.855 6.163 6.256 6.319 6.37240.325 S-12 5.66 6.082 6.216 6.298 6.35943.726 S-13 5.445 5.996 6.173 6.275 6.34547.127 S-14 5.173 5.885 6.128 6.252 6.3350.52 S-15 4.676 5.567 5.935 6.157 6.292

53.929 S-16 3.937 5.01 5.508 5.856 6.09757.33 S-17 2.976 4.217 4.825 5.309 5.686

60.731 S-18 1.88 3.2 3.862 4.459 4.98964.132 S-19 0.876 2.004 2.61 3.23 3.8867.533 S-20 0.165 0.7 1.1 1.564 2.175

HYDROSTATICSHYDROSTATICSHYDROSTATICS

DRAUGHT(M) 0 0.617 1.233 1.85 2.46 3.08 3.7DISPLACEMENT(TON) 0 267.1 693 1165 1662 2171 2696WATER PLANE AREA(M SQUARE) 0 617.553 716.498 769.002 797.316 818.744 840.24PRISMETIC CO-EFFICIENT 0 0.612 0.694 0.731 0.765 0.787 0.804BLOCK CO-EFFICIENT 0 0.534 0.639 0.689 0.729 0.756 0.776MIDSHIP AREA CO-EFFICIENT 0 0.898 0.935 0.953 0.962 0.967 0.97WATER PLANE AREA CO-EFFICIENT 0 0.779 0.833 0.861 0.884 0.901 0.917LCB FROM AMIDSHIP(M) 0 -6.473 -4.805 -4.419 -4.195 -3.9 -3.616LCF ROM AMIDSHIP(M) 0 -4.121 -3.685 -3.844 -3.359 -2.722 -2.168KB(M) 0 0.379 0.719 1.054 1.384 1.711 2.038BMT(M) 0 25.214 12.239 8.088 6.05 4.873 4.114BML(M) 0 574.83 312.922 221.943 169.123 137.3 117.438MTC (TON-M) 0 21.696 30.539 36.303 39.374 41.725 44.322

HYDROSTATIC CURVESHYDROSTATIC CURVES

0

500

1000

1500

2000

2500

3000

0 2 4

DRAUGHT

DISPLACEMENT(TON)

WATERPLANEAREA(MSQUARE)

0

0.2

0.4

0.6

0.8

1

1.2

0 2 4

DRAUGHT

PRISMETICCO-EFFICIENT

BLOCK CO-EFFICIENT

MIDSHIPAREA CO-EFFICIENT

WATERPLANE AREACO-EFFICIENT

0

100

200

300

400

500

600

700

0 1 2 3 4

DRAUGHT

BMT(M)

BML(M)

MTC (TON-M)

-7

-6

-5

-4

-3

-2

-1

0

1

2

3

0 2 4

DRAUGHT

LCB FROMAMIDSHIP(M)

LCF ROMAMIDSHIP(M)

KB(M)

SCANTLINGSCANTLING

► TAKING FRAME SPACING AS 500mm , WE GOT THE FOLLOWING SCANTLING TAKING FRAME SPACING AS 500mm , WE GOT THE FOLLOWING SCANTLING ACCORDING TO RULE BOOK:ACCORDING TO RULE BOOK:

► (ALL THE UNITS ARE IN mm)(ALL THE UNITS ARE IN mm)► MAIN DECK PLATE: 7MAIN DECK PLATE: 7► UPPER DECK PLATE:7UPPER DECK PLATE:7► BRIDGE DECK PLATE 7BRIDGE DECK PLATE 7► ROOF PLATE:6ROOF PLATE:6► CENTER KEELSON: T-450*250*10CENTER KEELSON: T-450*250*10► SIDE KEELSONS: T-350*150*10SIDE KEELSONS: T-350*150*10► SIDE STRINGERS: T-250*150*8SIDE STRINGERS: T-250*150*8► FLOORS: T-450*100*10FLOORS: T-450*100*10► WEB FRAME: T- 250*125*8WEB FRAME: T- 250*125*8► MAIN FRAME: L-75*75*6MAIN FRAME: L-75*75*6► DECK GIRDER: T-200*100*8DECK GIRDER: T-200*100*8► DECK BEAM: L-65*65*6DECK BEAM: L-65*65*6► BOTTOM LONGITUDINALS: L-75*75*6BOTTOM LONGITUDINALS: L-75*75*6► DECK LONGITUDINALS: L-65*65*6DECK LONGITUDINALS: L-65*65*6

MIDSHIP SECTION MIDSHIP SECTION DRAWINGDRAWING

SHELL EXPANSION DRAWINGSHELL EXPANSION DRAWING

IN CONSTRUCTING HULL, WE WILL USE IN CONSTRUCTING HULL, WE WILL USE 8 KINDS OF PLATES 8 KINDS OF PLATES

THIS IS ILUSTRATED IN THE 3D IMAGE THIS IS ILUSTRATED IN THE 3D IMAGE WHICH WILL SHOW THE WHICH WILL SHOW THE DISTRIBUTION OF THE SERIES OF THE DISTRIBUTION OF THE SERIES OF THE PLATESPLATES

WEIGHT ESTIMATIONWEIGHT ESTIMATION

►WE ESTIMATED THE DISPLACEMENT WE ESTIMATED THE DISPLACEMENT AND THE POSITION OF THE CG BY AND THE POSITION OF THE CG BY TAKING INTO ACCOUNT THE TAKING INTO ACCOUNT THE STRUCTURAL MEMBERS, OTHER LIGHT STRUCTURAL MEMBERS, OTHER LIGHT WEIGHTS, WEIGHT OF THE WEIGHTS, WEIGHT OF THE PASSENGERS , CARGO, AND OTHER PASSENGERS , CARGO, AND OTHER DEAD WEIGHTS.DEAD WEIGHTS.

WEIGHT ESTIMATION MAIN HULL ITEMS

ITEMS WEIGHT(T) VCG(m) MOMENT LCG(m) MOMENT

HULL PLATES 83.89 1.06 88.9234 25 2097.25MAIN DECK PLATE 39.5 3.7 146.15 29 1145.5BHD AND STIFFNERS 15 2 30 31 465KEELSONS 15 0.3 4.5 31 465FLOORS 22.72 0.25 5.68 29 658.88WEBFRAMES 60 0.9 54 29 1740MAIN FRAMES 65 0.9 58.5 29 1885DECK GIRDER 9 3.7 33.3 30 270DECK BEAM 25 8 200 40 1000SIDE STRINGER 3.78 1.9 7.182 35 132.3STEM 0.5 2 1 69 34.5BOLLARDS 0.5 3.7 1.85 67 33.5ENGINEGIRDER 1.89 1 1.89 10 18.9FENDER 3.5 3.7 12.95 35 122.5BRACKETS 3 6 18 30 90PIPES 2 5 10 38 76FACE PLATE 1 0.1 0.1 10 10BOTTOM LONGS 3 0.1 0.3 32 96

total 354.28 674.3254 10340.33

TOTAL WEIGHT WILL INCREASE BY 5% TO ACCOMMODATE SMAL STRUCTURAL ITEMSTHERE FORE THE TOTAL WEIGHT OF HULL INTES ARE 371.994VCG= 1.903369LCG= 29.18689

WEIGHT ESTIMATE : SUPER STRUCTURE

ITEMS WEIGHT(T) VCG(m) MOMENT LCG(m)

DECK PLATES 131.7 6.3 829.71 30FRAME 6.81 9 61.29 31BEAM 60 6.5 390 30GIRDER 12 5.4 64.8 30STIFFENER+BEAM+GIRDER 5 7 35 35ACCOMODATION AND STIFFEN 5 7 35 37DECK LONG 13.51 6.3 85.113 40

TOTAL 234.02 1500.913

TOTAL WEIGHT OF SUPER STRUCTURE WILL INCREASE BY 5% TO ACCOMMODATE SMALL STRUCTURAL ITEMSTHERE FORE,TOTAL WEIGHT OF SUPER STRUCTURE WILL BE 245.721

VCG= 6.41361LCG= 30.86279

OTHER ITEMSEM

ITEM WEIGHT VCG MOMENT LCG

MAIN ENGINES 6 0.5 3 9RUDDER ARRANGEMENT 1 0.1 0.1 0.5ANCHOR AND CHAIN 3 2 6 66WOOD AND OUTFITTINGS 5 4.8 24 35

TOTAL 15 33.1

TOTAL WEIGH OF THESE OTHER ITEM WILL INCREASE BY 5% TO ACCOMMODATE SMALL STRUCTURAL ITEMSTHEREFORE,TOTAL WEIGHT OF THE OTHER ITEM WILL BE 15.75

VCG= 2.206667LCG= 28.5

LIGHTSHIP ESTIMATIONWEIGHT VCG MOMENT LCG MOMENT

ITEMSMAIN HULL 371.994 1.903369 708.0417 29.18689 10857.35SUPERSTRUCTURE 245.721 6.41361 1575.959 30.86279 7583.636OTHER ITEMS 15.75 2.206667 34.755 28.5 448.875

TOTAL 633.465 2318.755 18889.86

VCG= 3.660432LCG= 29.81989

TOTAL DISPLACEMENT:

ITEM WEIGHT VCG MOMENT LCG MOMENT

LIGHTSHIP 633.465 3.660432 2318.755 29.81989 18889.86PASSANGERS AND CREWS 40 5.5 220 30 1200OTHER DEAD WEIGHTS 5 6 30 25 125

TOTAL 678.465 2568.755 20214.86

THEREFORE:THE TOTAL DISPLACEMENT OF THE SHIP IS 678.465VCG OF THE SHIP= 3.786128LCG OF THE SHIP= 29.79499

STABILITYSTABILITY

►WE HAVE DONE STABILITY ANALYSIS WE HAVE DONE STABILITY ANALYSIS OF OUR DESIGN, BYOF OUR DESIGN, BY

►CROSS CURVES OF STABILITYCROSS CURVES OF STABILITY►GZ CURVEGZ CURVE►VARIFICATION OF STABILITY CRITERIAVARIFICATION OF STABILITY CRITERIA

CROSS CURVESCROSS CURVES

DISPLACEMENT 400 444.4 488.9 533 578 622 667 711 756 80030 DEG PORT -4.428 -4.382 -4.338 -4.296 -4.255 -4.213 -4.167 -4.118 -4.066 -4.01120 DEG PORT -3.931 -3.849 -3.773 -3.702 -3.635 -3.572 -3.512 -3.455 -3.4 -3.3410 DEG PORT -2.811 -2.694 -2.585 -2.484 -2.389 -2.3 -2.217 -2.139 -2.065 -1.9960 DEG PORT 0 0 0 0 0 0 0 0 0 010 GEG STARB. 2.811 2.694 2.585 2.484 2.389 2.3 2.217 2.139 2.065 1.99620 DEG STARB 3.931 3.849 3.773 3.702 3.635 3.572 3.512 3.455 3.4 3.3430 DEG STARB 4.428 4.382 4.338 4.296 4.255 4.213 4.167 4.118 4.066 4.01140 DEG STARB 4.616 4.587 4.55 4.506 4.457 4.406 4.349 4.291 4.231 4.1750 DEG STARB 4.506 4.468 4.425 4.378 4.328 4.277 4.224 4.171 4.116 4.06160 DEG STARB 4.151 4.114 4.074 4.033 3.991 3.947 3.903 3.858 3.813 3.76770 DEG STARB 3.621 3.591 3.559 3.528 3.496 3.463 3.43 3.397 3.364 3.33180 DEG STARB 2.956 2.936 2.916 2.896 2.876 2.856 2.837 2.818 2.798 2.77990 DEG STARB 2.19 2.182 2.174 2.167 2.161 2.155 2.15 2.145 2.141 2.136100 DEG STARB 1.357 1.36 1.365 1.372 1.379 1.388 1.397 1.407 1.417 1.428110 DEG STARB 0.489 0.504 0.521 0.541 0.562 0.584 0.607 0.631 0.656 0.681120 DEG STARB -0.376 -0.351 -0.322 -0.291 -0.258 -0.223 -0.187 -0.15 -0.112 -0.074130 DEG STARB -1.195 -1.161 -1.124 -1.083 -1.04 -0.995 -0.949 -0.901 -0.852 -0.802140 DEG STARB -1.921 -1.876 -1.83 -1.782 -1.732 -1.68 -1.626 -1.571 -1.514 -1.456150 DEG STARB -2.513 -2.446 -2.382 -2.319 -2.257 -2.196 -2.136 -2.075 -2.014 -1.953160 DEG STARB -2.88 -2.783 -2.691 -2.602 -2.518 -2.436 -2.357 -2.281 -2.206 -2.133170 DEG STARB -2.686 -2.547 -2.416 -2.291 -2.172 -2.058 -1.948 -1.841 -1.738 -1.637180 DEG STARB 0 0 0 0 0 0 0 0 0 0

CROSS CURVES OF STABILITY

-5

-4

-3

-2

-1

0

1

2

3

4

5

6

0 100 200 300 400 500 600 700 800 900

DISPLACEMENT

KN

VA

LUE

S

30 DEG PORT 20 DEG PORT

10 DEG PORT 0 DEG PORT

10 GEG STARB. 20 DEG STARB

30 DEG STARB 40 DEG STARB

50 DEG STARB 60 DEG STARB

70 DEG STARB 80 DEG STARB

90 DEG STARB 100 DEG STARB

110 DEG STARB 120 DEG STARB

130 DEG STARB 140 DEG STARB

150 DEG STARB 160 DEG STARB

170 DEG STARB 180 DEG STARB

GZ CURVEGZ CURVE

ANGLE -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180GZ m -2.266 -2.206 -1.539 0 1.539 2.206 2.266 1.902 1.309 0.61 -0.14 -0.902 -1.644 -2.336 -2.952 -3.465 -3.845 -4.054 -4.021 -3.638 -2.575 0

GZ m

-5

-4

-3

-2

-1

0

1

2

3

-50 0 50 100 150 200GZ m

VARIFICATION OF STABILITY VARIFICATION OF STABILITY CRITERIACRITERIA

WE HAVE VARYFIED STABILITY CRITERIA DEFINED BY “ THE WE HAVE VARYFIED STABILITY CRITERIA DEFINED BY “ THE INLAND SHIPPING ORDINANCE 1976”INLAND SHIPPING ORDINANCE 1976”

THE RESULT OF THE CRITERIA IS PRESENTED IN THE NEXT SLIDE.THE RESULT OF THE CRITERIA IS PRESENTED IN THE NEXT SLIDE.

CRITERIA RESULTCRITERIA RESULT

THE AREA UNDER GZ CURVES UP TO 30 DEG SHULD BE THE AREA UNDER GZ CURVES UP TO 30 DEG SHULD BE ATLEAST .055 m-radATLEAST .055 m-rad

OUR RESULT IS .880 m-radOUR RESULT IS .880 m-rad

THE AREA UNDER GZ CURVES UP TO 40 DEG SHOULD BE THE AREA UNDER GZ CURVES UP TO 40 DEG SHOULD BE ATLEAST .09 m-radATLEAST .09 m-rad

OUR RESULT IS 1.2 m-radOUR RESULT IS 1.2 m-rad

AREA OF GZ CURVE BETWEEN 30 DEG AND AND 40 SHOULD BE AT AREA OF GZ CURVE BETWEEN 30 DEG AND AND 40 SHOULD BE AT LEAST .03 m-radLEAST .03 m-rad

OUR RESULT IS .37 m-radOUR RESULT IS .37 m-rad

GZ AT 30 DEG SHOULD BE ATLEAST .2mGZ AT 30 DEG SHOULD BE ATLEAST .2m

OUR RESULT IS 2.271mOUR RESULT IS 2.271m

MAXIMUM GZ SHOULD OCCUR ABOVE 25 DEGREEMAXIMUM GZ SHOULD OCCUR ABOVE 25 DEGREE

OUR RESULT IS 26.4 DEGREEOUR RESULT IS 26.4 DEGREE

FOR L>70m SHIPS , THE INITIAL GM SHOULD BE ATLEAST .15mFOR L>70m SHIPS , THE INITIAL GM SHOULD BE ATLEAST .15m

OUR RESULT IS 9.39mOUR RESULT IS 9.39m

RUDDER AND STEERING RUDDER AND STEERING ARRANGEMENTARRANGEMENT

►HERE ALL MAJOR SCANTLING OF HERE ALL MAJOR SCANTLING OF RUDDER IS TAKEN FROM THE NIPPON RUDDER IS TAKEN FROM THE NIPPON KAIJI KYOKAI (NKK) RULE BOOK FOR KAIJI KYOKAI (NKK) RULE BOOK FOR THE CONSTRUCTION AND THE CONSTRUCTION AND CLASSIFICATION OF SHIPS. CLASSIFICATION OF SHIPS.

SHAPE AND DIMENSIONS OF SHAPE AND DIMENSIONS OF RUDDERRUDDER

► PRINCIPAL DIMENSIONSPRINCIPAL DIMENSIONS► LOA =71 mLOA =71 m► LBP =66.77mLBP =66.77m► BMLD = 12.8mBMLD = 12.8m► DMLD = 3.71mDMLD = 3.71m► HMLD = 1.3mHMLD = 1.3m► CALCULATION OF RUDDER AREACALCULATION OF RUDDER AREA► RUDDER AREARUDDER AREA = ( = ( LLBPBP * H * HMLDMLD) / 60) / 60► = 1.44 m= 1.44 m22

► IN CASE OF TWIN RUDDER , AREA PER RUDDERIN CASE OF TWIN RUDDER , AREA PER RUDDER► =(1.44/ 2) m2=(1.44/ 2) m2► = 0.72 m2= 0.72 m2► ASPECT RATIO ASSUMEDASPECT RATIO ASSUMED------► h / b = 1.8h / b = 1.8► DIMENSIONS OF RUDDERDIMENSIONS OF RUDDER——► h = 1140 mmh = 1140 mm► b = 635 mmb = 635 mm► RUDDER IS OF RUDDER IS OF RECTANGULARRECTANGULAR SHAPE. SHAPE.

LOWER STOCK DIAMETERLOWER STOCK DIAMETER► CALCULATION OF RUDDER FORCECALCULATION OF RUDDER FORCE► FOR TWIN RUDDER BEHIND WING PRPPELLERS---FOR TWIN RUDDER BEHIND WING PRPPELLERS---► Q = 21.1 * A * V2 * Ө Q = 21.1 * A * V2 * Ө ► [reference : ships and naval architect—page 269 ][reference : ships and naval architect—page 269 ]► HERE, A = 0.72 m2HERE, A = 0.72 m2► V = (100 * .5144) m / sV = (100 * .5144) m / s► Ө = 35 Ө = 35 ► SO, Q = 14069.7 NSO, Q = 14069.7 N► CALCULATION OF C.P FROM TURNING AXISCALCULATION OF C.P FROM TURNING AXIS► C.P FROM LEADING EDGE----C.P FROM LEADING EDGE----► x = ( 0.195 + 0.305 SinӨ ) * bx = ( 0.195 + 0.305 SinӨ ) * b► = 0.233 m= 0.233 m► TURNING AXIS FROM LEADING EDGE----TURNING AXIS FROM LEADING EDGE----► 0.191 m (30 0.191 m (30 ٪٪ of breadth) of breadth) ► SO, C.P FROM TURNING AXIS ----SO, C.P FROM TURNING AXIS ----► r =( 0.233 - 0.191) mr =( 0.233 - 0.191) m► = 0.042 m= 0.042 m► CALCULATION 0F TWISTING TORQUECALCULATION 0F TWISTING TORQUE► T = Q * rT = Q * r► =1068.593 N-m=1068.593 N-m► CALCULATION 0F RUDDER LOWER STOCK DIA CALCULATION 0F RUDDER LOWER STOCK DIA ► ► d3 = (16 * t) / ( Π * f )d3 = (16 * t) / ( Π * f )► f = allowable stress for cast steel = 77.2 * 106 N /m2f = allowable stress for cast steel = 77.2 * 106 N /m2► SO.STOCK DIA = 0.0447 mSO.STOCK DIA = 0.0447 m► = .045 m= .045 m► =45 mm=45 mm► (N.B : HERE BENDING MOMENT IS NEGLIGIBLE DUO TO PRESENCE OF PINTLE)(N.B : HERE BENDING MOMENT IS NEGLIGIBLE DUO TO PRESENCE OF PINTLE)

UPPER STOCK UPPER STOCK DIAMETERDIAMETER

Upper stock diameter is obtained from Upper stock diameter is obtained from the following formula:the following formula:

DDusus=C(Ar=C(Ar11VV22))1/21/2

Where,A=rudder area(mWhere,A=rudder area(m22))V=speed of the ship (kn)V=speed of the ship (kn)

C=coefficient for intermediate value of e C=coefficient for intermediate value of e which is the ratio of the rudder area which is the ratio of the rudder area

measured between the ceterline of the measured between the ceterline of the rudder stock and the leading edge of rudder stock and the leading edge of

rudder to A and obtained by rudder to A and obtained by interpolationinterpolation

rr11=Distance from the centerline of the =Distance from the centerline of the rudder stock to the center of gravity of Arudder stock to the center of gravity of A

DDusus=35mm=35mm

SPACING OF RUDDER FRAMESPACING OF RUDDER FRAME

►Horizontal spacing of rudder frame is Horizontal spacing of rudder frame is obtained by the formula:obtained by the formula:

x=0.2(L/100)+0.4x=0.2(L/100)+0.4

=222mm=222mm

Vertical spacing of rudder frame=1.5xVertical spacing of rudder frame=1.5x

=285mm=285mm

RUDDER FRAME SPACING AND RUDDER FRAME SPACING AND CROSS SECTIONSCROSS SECTIONS

pipe

pipe

TOP VIEW

XX-SECTION VIEW

BOTTOM PLAN VIEW

RUDDER PLATE4mm THK

DIAMETER OF THE COUPLING DIAMETER OF THE COUPLING BOLTSBOLTS

►Diameter of the coupling bolt is Diameter of the coupling bolt is obtained by the following formula:obtained by the following formula:

► ddcbcb = 0.55(d = 0.55(d3311/n)/n)1/21/2 where where

► dd11=lower stock diameter=lower stock diameter

► n=number of bolts n=number of bolts ► ddcbcb=70mm =70mm

RUDDER COUPLINGRUDDER COUPLING

RUDDER COUPLING

DIAMETER OF THE PINTLE DIAMETER OF THE PINTLE BEARING AND SLEEVEBEARING AND SLEEVE

► As our ship’s speed is less than 14kn so the As our ship’s speed is less than 14kn so the diameter of the pintle is obtained by the diameter of the pintle is obtained by the formula :formula :

Diameter of the outer sleeve=(1.5V+25.2)kDiameter of the outer sleeve=(1.5V+25.2)k00(AC)(AC)1/21/2

=90mm =90mm

KK00=1.3-L/500 for ships length less than 150m=1.3-L/500 for ships length less than 150m

C=1.0C=1.0

Length of the bearing part lLength of the bearing part lbb

=1.2[1.5V+25.2k=1.2[1.5V+25.2k00(AC)(AC)1/21/2] ]

=60mm=60mm

Diameter of the inner sleeve=2.2kDiameter of the inner sleeve=2.2k00((ααAVAV22C)+lower stock C)+lower stock diadia

=70mm=70mm

RUDDER PINTLE ARRANGMENTRUDDER PINTLE ARRANGMENT

RUDDER PINTLE

STEERING ARRANGEMENTSTEERING ARRANGEMENT

CL

Typical Steering Arrangement(Twin Rudder)

NECK BEARING PARTNECK BEARING PART

BRK PLATE

DOUBLER PLATE

DETAIL OF RUDDER STOCKDETAIL OF RUDDER STOCK

UPPER BUSH

LOWER HOUSING

NECK BEARING PART

SCANTLING OF RUDDERSCANTLING OF RUDDER

► NONO

..NAME OF NAME OF

PARTSPARTSSIZE(mm)SIZE(mm) MATMAT

1 1 Rudder stockRudder stock Lower stock dia Lower stock dia 45mm,Upper 45mm,Upper stock dia 35mmstock dia 35mm

Forged Forged steelsteel

22 Rudder plateRudder plate 4mm thickness 4mm thickness

Forge Forge steelsteel

33 couplingcoupling 90mm dia90mm dia Forge Forge steelsteel

44 Coupling Coupling boltsbolts

10mm 10mm dia,25mmheightdia,25mmheight

Forged Forged steelsteel

55 sleevesleeve 10mm thickness10mm thickness BrassBrass

► 66 BushBush 12.5mm thickness12.5mm thickness Forged Forged steelsteel

77 Doubler plateDoubler plate 8mm thickness8mm thickness Forged Forged steelsteel

88 tillertiller 55mm dia55mm dia Forged Forged steelsteel

99 pintlepintle 10mm height10mm height Forged Forged steelsteel

1010 Pintle Pintle bearingbearing

60mm 60mm height,70mm diaheight,70mm dia

Forged Forged steelsteel

1111 Upper bushUpper bush Outer dia Outer dia 410mm,inner dia 410mm,inner dia 155mm155mm

Forged Forged steelsteel

SHAFT DIAMETERSHAFT DIAMETER

CALCULATION OF SHAFT DIAMETER Diameter of shaft------ k * [(Ps / {n * (1- (di / da)4 )} * Cw]1/3 * CEW REFERENCE: G L rule book. Where, Ps = power delivered by the shaft

1- (di / da)4 = 1.0 k = 120 (for propeller shaft) Cw = material factor = 560 / ( Rm +160) here , Rm = tensile strength of shaft material (N / mm) = 500 N / mm so, Cw = 0.848 Cew = 1.0 n = shaft revolution per minute =600 Ps = 327.21 kw FOR ONE ENGINE Putting all the values in the equation we get --- Diameter of the shaft = 93 mm

PROPELLER AND SHAFT PROPELLER AND SHAFT ARRANGEMENTARRANGEMENT

A BRACKET

A

A

SECTION : A-A

B

B

SECTION : B - B

C

C

SECTION : C - C

1 2 3 4

85

25 7 10 12 11 1314 15 17

18

1920 21

221624

2396

7 mm o/d pipe water feed

5

25

14

20

21

22

DIMENSION OF DIFFERENT PART DIMENSION OF DIFFERENT PART OF THE SHAFTOF THE SHAFT

No. Description No. off Dimensions

(mm) 1 Cone nut 1 240 leng 2 Cone nut securing

screw 2 12 dia ,35 leng

3 Propeller key 1 35 dep,240 leng

4 Propeller dia X pitch 1 305 dia 5 Aft. Brg . securing

screw 3 12 dia,80 leng

6 Cover plate securing screw

3 12 dia,35 leng

7 Aft locking ring 1 355 o/d,282 i/d, 96 leng

8 Cover plate 1 355 o/d,225 i/d, 48 leng

9 Lock ring securing screw

3 12 dia,113 leng

10 Forward locking ring 1 355 o/d,282 i/d, 85 leng

11 Rubber bearing 255 o/d,635 leng

12 Sterntube 1 282 o/d,255 i/d 13 Tailshaft 1 93 dia 14 Forward gland housing 1 367 o/d,282 i/d 15 Forward bearing 1 240 o/d

16 Greasy packing 3 turns 60 x 25 17 Gland ring 1 367 o/d 18 Gland studs and nuts 2 28 dia, 113

leng 19 Coupling key 1 35 dep,240

leng 20 Half coupling 1 536 o/d,360 i/d 21 Backing washer 1 2500 o/d,178

i/d, 10 thk

22 Locking nut 1 178 o/d 23 Sealing ring 1 215 o/d. 5 thk 24 Fwd.brg. securing

screw 1 60 leng,12 dia

25 Bearing lock ring 1 355 o/d, 62 leng

ACCORDING TO HOLTROP AND MENNEN METHOD: Rtotal=RF(1+k1)+RAPP+Rw+RB+RTR+RA

RF=Frictional resistance according to ITTC 1957 friction formula. RAPP=Appendage reistance Rw=Wave making resistance RB=Additional pressure resistance due to bulbous bow near the water surface RTR=Additional pressure resistance of immersed transom stern RA=Model-Ship correlation resistance

ETIMATION OF POWERETIMATION OF POWERUSING HOLTROP AND USING HOLTROP AND MENNEN METHODMENNEN METHOD

RW=C1C2C5▼ρ g×exp(m1Fn

d+m2cos((λFn-2))) C1=2223105C7

3.78613(T/B)1.07961(90-iE)-1.37565

C7=B/L when 0.11<B/L<0.25 C2=exp((-1.89√C 3) iE=1+89exp{(L/B)0.80856(1-Cwp)0.30484(1-C-0.0225lcb)0.6367(LR/B)0.34574(100▼/L) 0.16302

C5=1-0.8AT(BTCM) λ=1.446Cp-0.03L/B when L/B<12 m1=0.0140407L/T-1.75254▼1/3/L-4.79323B/L-C16

C16=8.07981Cp-13.8679Cp2+6.984388Cp

2

m2=C15Cp2exp(-0.1Fn

-2) C15=-.69385+(L/▼ 1/3-8.0)/2.3 d= -0.9

WAVE MAKING RESISTANCEWAVE MAKING RESISTANCE

CALCULATION OF WAVE CALCULATION OF WAVE MAKING RESISTANCEMAKING RESISTANCE

Length of the lwl 67.77

Beam lwl 12.75 HOLTROP AND MENNEN METHOD SPREADSHEETDraught 1.28Cp 0.654Cwp 0.79

lcb -0.8 INPUTSdisplacement(m 3̂) 665L/B 5.315294Fn 0.278995speed(m/s) 7.19

resulted coefficients :

Lr 22.13194iE 28.18248c7 0.188136

c1 1.143673 RESULTSc2 1c5 1c16 1.306646m1 -1.69076m2 -0.20049lamda 0.786225c15 -1.69385

Rw 43104.1

FRICTIONAL RESISTANCEFRICTIONAL RESISTANCE

Frictional resistance=(1+K2)CF

According to Holtrop and Mennen method: (1+K1)=C13{0.93+C12)(B/LR)0.92497(0.95-Cp)-0.521448(1-Cp+0.0255lcb)0.6906

For design, (1+K2)=1.18 Frictional resistance= 12.24×1.18=14.14 For 10 knots 17.4×1.18=20.53 For 12 knots 23.24×1.18= 27.42 For 14 knots 31.6×1.18=37.288 For 16 knots

MODEL-SHIP CORRELATION MODEL-SHIP CORRELATION RESISTANCERESISTANCE

MODEL-SHIP CORRELATION RESISTANCE Model-Ship Correlation Resistance=0.5ρSV2CA

CA=0.006(L+100)-0.16-0.00205+0.003√(L/7.5 )CB4C2(0.04-C4)

=6.18×10-4

Result for our ship: 4.627KN for 10 knots 6.663KN for 12 knots 9.070KN for 14 knots 11.84KN for 16 knots

APPENDAGE RESISTANCEAPPENDAGE RESISTANCE

APPENDAGE RESISTANCE According to Holtrop and Mennen method: RAPP=0.5ρV2SAPP(1+k2)eqCF

(1+k2)eq={∑(1+k 2) SAPP}/∑ SAPP

=2.2 for our ship SAPP=4.5 m2

Appendage resistance= 0.228KN for 10 Knots 0.308KN for 12 Knots 0.428KN for 14 Knots 0.555KN for 16 knots

TOTAL RESISTANCETOTAL RESISTANCE

Total resistance results: 39.488KN for 10 knots 55.79KN for 12 knots 80.018KN for 14 knots 114.95KN for 16 knots Total resistance Vs speed curve:

EFFECTIVE POWEREFFECTIVE POWER

Effective powers results: 394.88 KN for 10 knots 669.48 KN for 12 knots 1120.25 KN for 14 knots 1839.20 KN for 16 knots Effective power Vs Speed curve:

EFFICIENCYEFFICIENCY

EFFICIENCY PROPULSIVE COEFFICIENTS: w=2CB

5(1- CB)+0.04 =0.066 t=0.70w+0.06 =0.106 Hull efficiency:ηH=(1-t)/(1-w) =0.957 Propeller efficiency: According to Holtrop and Mennen method: ηR=0.9737+0111(Cp-0.0025lcb)+0.6325P/D =0.90 η0=0.70 [Using Bp-δ Diagram for 3.50 B series propellers PNA page 413] Shaft efficiency: ηS=.98 Total efficiency= ηH ×η R ×η 0 ×η S=0.590

BRAKE POWERBRAKE POWER

Brake power PB=PE/ηT

Results: 667.79 KW for 10 knots(897.16 HP) 1134.71 KW for 12 knots(1521.05HP) 1898.7 KW for 14 knots(2545.17HP) 3286.44 KW for 16 knots(4405.41HP)

ENGINE SELECTIONENGINE SELECTIONEngine Model: Volvo penta D12 MH Engine power:450 hp Engine RPM: 1800 Engine length:4m Engine width: 1.67 m Engine Hight:2.3m Engine Weight:9.6 ton Gear ratio: 4:1

ENGINE ENGINE

ENGINE FOUNDATION ENGINE FOUNDATION DRAWINGDRAWING

ENGINE FOUNDATIONENGINE FOUNDATION

GREAR BOX FOUNDATIONGREAR BOX FOUNDATION

BOTTOM CONSTRUCTION BOTTOM CONSTRUCTION DRAWINGDRAWING

DECK CONSTRUCTION DECK CONSTRUCTION DRAWINGSDRAWINGS

WEIGHT CALCULATION WEIGHT CALCULATION UPDATEUPDATE

OTHER ITEMSEM

ITEM WEIGHT VCG MOMENT LCG

MAIN ENGINES 9.6 0.5 4.8 9RUDDER ARRANGEMENT 1.5 0.1 0.15 0.5ANCHOR AND CHAIN 3 2 6 66WOOD AND OUTFITTINGS 5 4.8 24 35

TOTAL 19.1 34.95

TOTAL WEIGH OF THESE OTHER ITEM WILL INCREASE BY 5% TO ACCOMMODATE SMALL STRUCTURAL ITEMSTHEREFORE,TOTAL WEIGHT OF THE OTHER ITEM WILL BE 20.055

VCG= 1.829843LCG= 24.09162

LIGHTSHIP ESTIMATIONWEIGHT VCG MOMENT LCG MOMENT

ITEMSMAIN HULL 371.994 1.903369 708.0417 29.18689 10857.35SUPERSTRUCTURE 245.721 6.41361 1575.959 30.86279 7583.636OTHER ITEMS 20.055 1.829843 36.6975 24.09162 483.1575

TOTAL 637.77 2320.698 18924.14

VCG= 3.638769LCG= 29.67236

TOTAL DISPLACEMENT:

ITEM WEIGHT VCG MOMENT LCG MOMENT

LIGHTSHIP 637.77 3.638769 2320.698 29.67236 18924.14PASSANGERS AND CREWS 40 5.5 220 30 1200OTHER DEAD WEIGHTS 5 6 30 25 125

TOTAL 682.77 2570.698 20249.14

THEREFORE:THE TOTAL DISPLACEMENT OF THE SHIP IS 682.77VCG OF THE SHIP= 3.765101LCG OF THE SHIP= 29.65734

Hydrostatics at new loading condition

Draft Amidsh. m 1.291Displacement tonne 682Draft at FP m 1.053Draft at AP m 1.53Draft at LCF m 1.326Trim (+ve by stern) m 0.477WL Length m 68.5WL Beam m 12.761Wetted Area m^2 795.462Waterpl. Area m 2̂ 740.086Prismatic Coeff. 0.717Block Coeff. 0.638Midship Area Coeff. 0.934Waterpl. Area Coeff. 0.847LCB from zero pt. m 29.631LCF from zero pt. m 30.755KB m 0.837KG m 3.76BMt m 13.25BML m 338.72GMt m 10.326GML m 335.797MTc tonne.m 33.958

HYDROSTATIC CURVESHYDROSTATIC CURVES

STABILITY AT NEW LOADING STABILITY AT NEW LOADING CONDITIONCONDITION

VARIFICATION OF STABILTY VARIFICATION OF STABILTY CRITERIA FOR NEW LOADCASECRITERIA FOR NEW LOADCASE

VARIFICATION OF STABILITY CRITERIA: *THE AREA UNDER GZ CURVES UP TO 30 DEG SHULD BE ATLEAST .055 m-rad OUR RESULT IS 0.946 *THE AREA UNDER GZ CURVES UP TO 40 DEG SHOULD BE ATLEAST .09 m-rad OUR RESULT IS 1.337 *AREA OF GZ CURVE BETWEEN 30 DEG AND AND 40 SHOULD BE AT LEAST .03 m-rad OUR RESULT IS 0.391 *GZ AT 30 DEG SHOULD BE ATLEAST .2m OUR RESULT IS 2.271m *MAXIMUM GZ SHOULD OCCUR ABOVE 25 DEGREE OUR RESULT IS 26.4 DEGREE *FOR L>70m SHIPS , THE INITIAL GM SHOULD BE ATLEAST .15 OUR RESULT IS 10.326