水中爆発荷重を受ける水没構造物の衝撃応答(第2報) : 構造表面圧力に与える物体-構造連成効果について

概要

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IN order to Evaluate the safety of a submerged structure subjected to UNDerwater EXplosion (UNDEX) loads, it is necessary to estimate the structural response accurately. This paper describes the experimental results and numerical simulation results of UNDEX test using thin and thick cylindrical shells. From this study, fluid-structure interaction effects of peak value, waveform and impulse intensity of surface pressure are discussed. And, it is shown that surface pressure of thin cylindrical shell is strongly influenced by surface cavitation. Further, it is shown that the reasonably modified numerical simulation results have very good agreement with the experimental results, and the mutual comparison between experimental results and numerical simulation results is helpful to estimate the true peak pressure.