自然風波中における漁船船型モデルの運動解析-II : 横運動について

概要

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The authors have undertaken the experiments in the wind waves with the models of fishing boats. The spectral analysis of the transversal motion of the hull in the wind waves treated in this paper follows the analysis of the longitudinal motion in the previous paper. The motion spectra, n-th moments and bandwidth parameters were computed from observed wave spectra and the frequency response functions calculated with O.S.M. according to two hypothesis of long-crested and short-crested waves. Additionally the wind made components of motion spectra were calculated from the records of wind velocity. The conclusions were obtained from a comparison of the observed and computed results as follows. The frequency range of the motion spectra which were obtained according to the long-crested hypothesis were different from the observed range. On the contrary, the frequency range and the power coincided with the experimental values according to the short-crested hypothesis. In addition, it was clarified that the power of transversal motion grows larger, while the band width of spectrum grows smaller as the encounter frequency corresponding to the wave frequency of wide range which comes closer to the proper frequency of rolling motion.
社団法人日本航海学会の論文
1983-09-25