1. Coefficient of Forms Lecture 2
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

2. Co-ordinate System of Ship
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

3. Coefficients of form Are the dimensionless number that describes the fineness and the overall shape of the ship.
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

4. The block coefficient of fineness of displacement (Cb)
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

5. The block coefficient of fineness of displacement (Cb)
The block coefficient of a ship at any particular draft is the ratio of the volume of displacement at that draft to the volume of a rectangular block having the same overall length, breadth and depth.
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

6. The block coefficient of fineness of displacement (Cb)
Volume of displacement Block coefficient (Cb)= Volume of the block = L x B x draft Volume of displacement = L x B x draft x Cb
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

7. The block coefficient of fineness of displacement (Cb)
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

8. The block coefficient of fineness of displacement (Cb)
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

9. The block coefficient of fineness of displacement (Cb)
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

10. The coefficient of fineness of the water-plane area (Cw)
It is the ratio of the area of the water-plane to the area of a rectangle having the same length and maximum breadth.
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

11. The coefficient of fineness of the water-plane area (Cw)
Area of water-plane Coefficient of fineness (Cw ) = Area of rectangle ABCD = L x B Area of the water-plane = L x B x Cw
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

12. The coefficient of fineness of the water-plane area (Cw)
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

13. The coefficient of fineness of the water-plane area (Cw)
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

14. The midships coefficient (Cm)
The midships coefficient to any draft is the ratio of the transverse area of the midships section (Am) to a rectangle having the same breadth and depths.
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

15. The midships coefficient (Cm)
Midships area (Am) Midships coefficient (Cm) = Area of rectangle = B x d Midships area (Am) = L x B x Cm
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

16. The prismatic coefficient (Cp)
The prismatic coefficient of a ship at any draft is the ratio of the volume of displacement at that draft to the volume of a prism having the same length as the ship and the same cross-sectional area as the ship’s midships area.
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

17. The prismatic coefficient (Cp)
Volume of ship Prismatic coefficient (Cp) = Volume of prism = L x Am Volume of ship = L x Am x Cp
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

18. The prismatic coefficient (Cp)
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

19. The relation between coefficients
Am Volume of ship
Cm x Cp = x
B x d L x Am
Volume of ship =
L x B x d
Cm x Cp = Cb
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

20. Hull Form Coefficients
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

21. Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

22. Half breadth Plan Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

23. Sheer Plan
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

24. Body Plan
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

25. Examples
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

26. Examples
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019

27. Examples
Laboni Afroz, Assistant Professor, NAME, BUET
2/23/2019