船体運動データからの方向波スペクトルの推定について-II : 水槽実験による推定精度の検討

概要

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In this paper, the authors deal with the quantitative accuracy of directional wave spectra which are estimated from only a set of simultaneous records of ship motions. The method for estimation is so called Extended Maximum Likelihood Method with a stochastic approach using a multidimensional auto regressive model. And we propose a method for correction with the use of cross spectra of ship motions. We report some results of model tests which were carried out in a wave tank with an array of wave height sensors. In order to examine the estimating accuracy, directional wave spectra estimated from ship motions are compared with the ones based on the array of wave height sensors. It becomes clear that we can estimate the direction in which a directional wave spectrum takes the maximum value by the proposed method.
公益社団法人日本航海学会の論文
1992-09-25