中英文对照干舷计算书
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1. The Basis of Freeboard Calculation
The calculation shall be in accordance with International Convention on Load Line 1966 with amendment for 1979, modified by protocol of 1988 for Type “A” ship.
2. Primary Parameter for this vessel
L BP = 90.0 m B = 15.0 m D = 6.9 m T = 5.4 m ∆ = 5607.7 t
3. Defined Parameter for this vessel 1. Length L
L WL(0.85D) ⨯ 96% = 92.064 ⨯ 96% = 88.381 m L PP(0.85D) = 90.079 m so: L = 90.079 m 2. Breadth B
B = 15.0 m 3. Depth D
D = 6.9 m
4. Calculated Depth D 1
D 1 = 6.9 + 0.012 = 6.912 m 5. Block Coefficient C b
1
b d B L C ⋅⋅∇
=
where: d 1 = 0.85D = 5.865 m
∇ = 5995.0 m 3
0.75655.865
15.090.0795995.0
C b =⨯⨯=
> 0.68
4. Freeboard Calculation
This vessel to be “A” type ship.
Minimum Freeboard F = F 0 + f 1 + f 2 + f 3 + f 4 + f 5 + f 6 4.1 Base Freeboard F 0
F 0 = 985.185 mm 4.2 Length Correction f 1
This vessel is type “A” ship, so: f 1 = 0
4.3 Block Coefficient Correction f 2
1)1.36
0.68
C )(
f (F f b 102-++=
where: f 1 = 0
C b = 0.7565
so: f 2 = 55.417 mm 4.4 Depth Correction f 3
)R 15
L (D f 13-
= where: R = L/0.48 = 187.665 D 1 = 6.912 m > L/15 = 6.005
L = 90.079 m
so: f 3 = 170.162 mm
4.5 Superstructure Correction f 4
The height of forecastle and poop is 2.70m and larger than standard height H 1=1.951m and
the
length
of
superstructure
is
6.716+21.6+0.015=28.331m=0.315L, so k is 0.225 according to the table and f 0
is 888.894 mm, f 4 = f 0 ⨯ k
so: f 4 = 199.986 mm
4.6 Non-standard Sheer Correction f 5
The ordinates of standard sheer profile Station
Formula Ordinate(mm) Factor Product After half
After perpendicular
25(L/3+10) 1000.658 1 1000.658 L/6 from A.P.
11.1(L/3+10)
444.292
3
1332.876
L/3 from A.P. 2.8(L/3+10)
112.074 3 336.222 Amidships 0 0 1 0 Forward half
Amidships 0 0 1 0 L/3 from F.P.
5.6(L/3+10)
224.147
3
672.441
L/6 from F.P. 22.2(L/3+10) 888.585 3 2665.755 Forward perpendicular
50(L/3+10)
2001.317
1
2001.317
The standard average height of sheer:
After half mm 720.333)0222.336876.1332658.1000(81
h a =+++⨯=
Forward half mm 667.439)0441.672755.2665317.2001(8
1
h f =+++⨯=
The actual height of sheer to be 0mm both after and forward half.
Because forecastle height 2.911m is greater than the standard 1.951m, sheer credit is given for the forecastle:
3L
yL's F =
where: y = 2.911 – 1.951 = 0.96 m = 960 mm
L’ = 6.731 m L = 90.079 m
so: mm 911.23079
.903731
.69603L yL's F =⨯⨯==
Because poop height 2.70m is greater than the standard 1.951m, sheer credit is