STARTING IN THE NAME OF ALLAH WHO IS MOST BENEFICENT AND MOST MERCIFUL

1. STARTING IN THE NAME OF ALLAH WHO IS MOST BENEFICENT AND MOST MERCIFUL

2. NAME 338SHIP DESIGN PROJECT AND PRESENTATION • COURCE TEACHER: PROFESSOR KHABIRUL HAQUE CHOWDHURY STUDENTS: MD. AL- AMIN PAVEL MD. IKRAM HUSSAIN TALUKDAR

3. OUR PROJECT • TYPE OF SHIP: PASSENGER VESSEL • ROUTE: DHAKA-CHANDPUR-BARISAL

4. Principal Particulars • EXISTING: LOA=46.61m Breadth:8.53m Depth:2.44m Draught:1m PROPOSED: LOA=71m Breadth:12.8m Depth:3.71m Draught:1.3m

5. GENERAL ARRANGEMENT

7. LINES PLAN B1 B2 B3 B4 B5 B6 WL5 WL4 WL3 WL2 WL1 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 B6 B5 B4 B3 B2 B1

8. OFFSET TABLE

9. HYDROSTATICS

10. HYDROSTATIC CURVES

11. SCANTLING • TAKING FRAME SPACING AS 500mm , WE GOT THE FOLLOWING SCANTLING ACCORDING TO RULE BOOK: • (ALL THE UNITS ARE IN mm) • MAIN DECK PLATE: 7 • UPPER DECK PLATE:7 • BRIDGE DECK PLATE 7 • ROOF PLATE:6 • CENTER KEELSON: T-450*250*10 • SIDE KEELSONS: T-350*150*10 • SIDE STRINGERS: T-250*150*8 • FLOORS: T-450*100*10 • WEB FRAME: T- 250*125*8 • MAIN FRAME: L-75*75*6 • DECK GIRDER: T-200*100*8 • DECK BEAM: L-65*65*6 • BOTTOM LONGITUDINALS: L-75*75*6 • DECK LONGITUDINALS: L-65*65*6

12. MIDSHIP SECTION DRAWING

13. SHELL EXPANSION DRAWING IN CONSTRUCTING HULL, WE WILL USE 8 KINDS OF PLATES THIS IS ILUSTRATED IN THE 3D IMAGE WHICH WILL SHOW THE DISTRIBUTION OF THE SERIES OF THE PLATES

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

21. STABILITY • WE HAVE DONE STABILITY ANALYSIS OF OUR DESIGN, BY • CROSS CURVES OF STABILITY • GZ CURVE • VARIFICATION OF STABILITY CRITERIA

22. CROSS CURVES

24. GZ CURVE

25. VARIFICATION OF STABILITY CRITERIA WE HAVE VARYFIED STABILITY CRITERIA DEFINED BY “ THE INLAND SHIPPING ORDINANCE 1976” THE RESULT OF THE CRITERIA IS PRESENTED IN THE NEXT SLIDE.

26. CRITERIA RESULT THE AREA UNDER GZ CURVES UP TO 30 DEG SHULD BE ATLEAST .055 m-rad OUR RESULT IS .880 m-rad THE AREA UNDER GZ CURVES UP TO 40 DEG SHOULD BE ATLEAST .09 m-rad OUR RESULT IS 1.2 m-rad AREA OF GZ CURVE BETWEEN 30 DEG AND AND 40 SHOULD BE AT LEAST .03 m-rad OUR RESULT IS .37 m-rad 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 .15m OUR RESULT IS 9.39m

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

28. SHAPE AND DIMENSIONS OF RUDDER • PRINCIPAL DIMENSIONS • LOA =71 m • LBP =66.77m • BMLD = 12.8m • DMLD = 3.71m • HMLD = 1.3m • CALCULATION OF RUDDER AREA • RUDDER AREA = (LBP * HMLD) / 60 • = 1.44 m2 • IN CASE OF TWIN RUDDER , AREA PER RUDDER • =(1.44/ 2) m2 • = 0.72 m2 • ASPECT RATIO ASSUMED--- • h / b = 1.8 • DIMENSIONS OF RUDDER— • h = 1140 mm • b = 635 mm • RUDDER IS OF RECTANGULAR SHAPE.

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

30. UPPER STOCK DIAMETER Upper stock diameter is obtained from the following formula: Dus=C(Ar1V2)1/2 Where,A=rudder area(m2) V=speed of the ship (kn) C=coefficient for intermediate value of e which is the ratio of the rudder area measured between the ceterline of the rudder stock and the leading edge of rudder to A and obtained by interpolation r1=Distance from the centerline of the rudder stock to the center of gravity of A Dus=35mm

31. SPACING OF RUDDER FRAME • Horizontal spacing of rudder frame is obtained by the formula: x=0.2(L/100)+0.4 =222mm Vertical spacing of rudder frame=1.5x =285mm

32. RUDDER FRAME SPACING AND CROSS SECTIONS

33. DIAMETER OF THE COUPLING BOLTS • Diameter of the coupling bolt is obtained by the following formula: • dcb = 0.55(d31/n)1/2 where • d1=lower stock diameter • n=number of bolts • dcb=70mm

34. RUDDER COUPLING

35. DIAMETER OF THE PINTLE BEARING AND SLEEVE • As our ship’s speed is less than 14kn so the diameter of the pintle is obtained by the formula : Diameter of the outer sleeve=(1.5V+25.2)k0(AC)1/2 =90mm K0=1.3-L/500 for ships length less than 150m C=1.0 Length of the bearing part lb =1.2[1.5V+25.2k0(AC)1/2] =60mm Diameter of the inner sleeve=2.2k0(αAV2C)+lower stock dia =70mm

36. RUDDER PINTLE ARRANGMENT

37. STEERING ARRANGEMENT

38. NECK BEARING PART

39. DETAIL OF RUDDER STOCK

40. SCANTLING OF RUDDER

42. SHAFT DIAMETER

43. PROPELLER AND SHAFT ARRANGEMENT

44. DIMENSION OF DIFFERENT PART OF THE SHAFT

46. ETIMATION OF POWERUSING HOLTROP AND MENNEN METHOD

47. WAVE MAKING RESISTANCE

48. CALCULATION OF WAVE MAKING RESISTANCE

49. FRICTIONAL RESISTANCE

50. MODEL-SHIP CORRELATION RESISTANCE