船体運動計測記録からの波予測の試み

概要

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The authors attempted to estimate the wave spectrum from the record of the longitudinal motion of the hull and the frequency response function of the motion. It was clarified in the previous paper of authors that the longitudinal motion in head sea is presumed accuratelly from the wave spectrum and the frequency response function according to the long-crested hypothesis. The authors carried out the calculations of the wave spectra from the response functions and the motion spectra obtained from the model experiments in the wind waves in Ohnuma. The power and the frequency band of the estimated spectra agrees upon those of observed spectra in the frequency range in which the response function were larger than 1.0. In the following step, the wave spectrum calculated through the experiment with the actual ship was compared to I.T.T.C. and I.S.S.C. standard spectra. As the result it was clarified that acculate presumption of the wave spectrum and wave height is possible through the calibration with the n-th moments of I.S.S.C. standard spectra of which the wave height and the steepness are different respectively, calculated upon the frequency range of infinity and the response functions are larger than 1.0.
社団法人日本航海学会の論文
1983-09-25