Page 365 - Practical Ship Design

322 Chapter 11

compartments 1 11 2 I 3 I 4 I 5 I 61

compt length I 51 25 f 25 1 20 ! 20 t 51

A.T. to bhd 15 I 30 f 55 f 75 1 95 ; ;loo

1 Item Formula Condition Single Compartments
1 2 3* 4 5 6
x1 0 5 30 55 75 95
x2 5 30 55 75 95 100
El XllLs 0.00 0.05 0.30 0.55 0.75 0.95
E2 x21Ls 0.05 0.30 0.55 0.75 0.95 1.00
E El+E2-1 -0.95 -0.65 -0.15 0.30 0.70 0.95
J E2-El 0.05 0.25 0.25 0.20 0.20 0.05
J’ J-E E20 -0.10 -0.50 -0.90
J’ J+E E<O -0.90 -0.40 0.10
J,,, 481Ls max 0.24 0.24 0.24 0.24 0.24 0.24 0.24
a 1.2 + 0.8 E max 1.2 0.44 0.68 1.08 1.20 1.20 1.20
F 0.4+0.25 E(1.2 + 0.01 0.09 0.31 0.58 0.82 0.97
a)
y JIJmax 0.20833 1.04167 1.04167 0.83333 0.83333 0.20833
F1 y2- f13 Y<l 0.04039 0.50154 0.50154 0.04039
F1 y- 113 y> 1 0.70833 0.70833
F2 y3/3 - y411 2 Y<l 0.00286 0.15271 0.15271 0.00286
F2 y2/2 - y13 + 1112 y I 1 0.27865 0.27865
P (F1)(JmJ 0.00969 0.17000 0.17000 0.12037 0.12037 0.00969
9 0.4(F2)(Jrn,)* 0.00007 0.00642 0.00642 0.00352 0.00352 0.00007
p, F + 0.5(a)(P) + Afi incl. A.T. 0.01270
q*
p, 1 - F + 0.5(a)(P)* Ford incl. F.T. amid- 0.03582
shp.
P, (a)(P)* ex A.T. & F.T. 0.11560 0.17718 0.14444 0.14444
s, compartments
reduced by q,
PIS, cal. with F2
A sum of p, . s, based y=J’lJ,,
*amidships

Fig. 11.4. Tabular calculation of probabilistic subdivision of cargo ships. Example features ship
with six compartments and L, = 100 m.