振動減衰に関する予備実験と考察

概要

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Hall structural damping is assumed to have dependency on vibration velocity in structure. On the other hand, hull material shows, in general, dependency on strain (structural damping). To confirm the damping characteristic of steel material, the experiments were performed for the canti-lever pates and it was confirmed the structural damping not to have dependency on vibration velocity but on strain. Basing on the experimental results, formula were introduced and expanded to higher mode vibration of hull girder. In addition, the experiments for canti-lever plate on water were performed to confirm the effect of fluid damping and it was obtained the fluid damping would not be negligible in comparison with structural damping. It was also obtained the concept of fluid resistance proportional to velocity explained well the fluid damping.
社団法人日本船舶海洋工学会の論文
2003-08-31