During sea trials relating to study of stresses in bilge keels, measurements in deck amidships indicated ship was frequently vibrated by wave excitation; there was no evidence of slamming and only two-node mode of vertical hull vibration seemed significant; amplitude was affected by ship speed, draft, trim, ship heading with respect to direction of waves and sea state; special trials were carried out; later, to improve propulsive performance ship was fitted with ram bow having bulb area ratio of 9%; differences in sea states precluded detailed comparison of bow forms; however, in both trials increase in vibration with ship speed followed very similar pattern.
Wave-excited hull vibration -- Measurements on 47,000 d.w.t. Tanker
Shipg World Shipbldr
Shipping World and Shipbuilder ; 161 , n 3817 ; p 412-415 + 417-419 + 426
1968
Article (Journal)
English
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