Page 363 - statbility for masters and mates

Strength curves for ships 351
Fig. 42.4
Murray's coef®cient `b' values
Values of b
Cb Hogging
0.80 10.555 0.78 10.238 0.76 9.943 0.74 9.647 0.72 9.329 0.70 9.014 0.68 8.716 0.66 8.402 0.64 8.106 0.62 7.790 0.60 7.494
Sagging
11.821 11.505 11.188 10.850 10.513 10.175
9.858 9.541 9.204 8.887 8.571
Let
then:
WA represent the moment of the weight aft of amidships,
BA represent the moment of the buoyancy aft of amidships, and W represent the ship's displacement,
Still Water Bending Moment (SWBM WF BF WA BA
This equation can be accurately evaluated by resolving in detail the many constituent parts, but Murray's Method may be used to give an approximate solution with suf®cient accuracy for practical purposes.