非周期的造波問題の周波数領域での取扱い (第1報) : 二次元物体に対するメモリー影響関数

概要

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Concerning the study of non-harmonic wave problems, the hydrodynamic responses, memory effect functions, generated by an impulse in oscillating velocity of a body are required. To deal with practical problems, the calculation method which gives these functions from the wave amplitude rations in the frequency domain is a useful tool. The wave amplitude ratios for all frequencies are obtained by connecting the exact values of the wave amplitude ratio in a medium frequency range with the asymptotic values in a high frequency range. In this paper, firstly, the authors investigate a more rational method of calculation for the asymtotic values of the wave amplitude ratio in a high frequency range. These values for forced swaying and rolling cylinder on a calm water are presented by extending the Ursell method for forced heaving circular cylinder. Secondly, numerical calculations of the memory effect functions are carried out for three Lewis form sections.
社団法人日本船舶海洋工学会の論文
1981-09-30