7. 32 The longitudinal bulkhead contribution N'Pb The transverse bulkhead contribution= Ioo where N = 30 (the number of bulkheads distributed about the hull circumference) N'= (the number of bulkheads distributed along the cylindrical hull section) Note from Figure a. In the case of the inner hull, the bulkhead radial force contribution is added to the "Equivalent Pressure" load. b. In the case of the outer hull, the bulkhead radial force contribution must be subtracted from the "Equivalent Pressure" load. Hence, the new force/area parameters become: 30Pb 6Pb _ i\ = pl + 211Rl + 100 - pl+ 0.1077Pb Now recalling the hoop stress relation from Section VII.2.2, we obtain a relation for 6R/R = Er' the bulkhead radial strain: Thus, the relative elongations of inner and outer hull radii may be determined.
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