SUMMARY OF INVESTIGATION OF MIDSHIP BENDING MOMENTS EXPERIENCED BY MODELS IN EXTREME REGULAR WAVES
STEVENS INST OF TECH HOBOKEN NJ
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A physical uper limit on midship bending moments being reached in regular waves of height significantly less than the theoretical upper limit of stability for progressive waves is investigated. The experiment included variation of ship type, of distribution of loading and of freeboard as model parameters. The ship types investigated were a modern cargo vessel, a large tanker, and a modern destroyer. Each model was tested at various speeds in regular head and following waves of several different lengths and of a wide range of heights. No significant upper limit of bending moment was found. However, the study establishes the grossly linear dependence of midship bending moment on wave height, even for extreme wave heights which may be encountered in service. These findings strengthened the case for determining design wave bending moments on the basis of statistical analysis of ocean waves andor resulting bending moments.
- Test Facilities, Equipment and Methods