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

概要

論文の詳細を見る
In this paper, the authors carried out on board experiments to estimate directional wave spectra from only a set of simultaneous records of ship motions. The estimating calculation consists of three steps. The first step is a calculation of cross spectra of ship motions by a stochastic approach using a multi-dimensional auto regressive model. The second one is a theoretical calculation of frequency transfer functions of the ship by New Strip Method. And, the last one is an estimation of directional wave spectra by using so called Extended Maximum Likelihood Method. The direction in which an estimated directional wave spectrum takes maximum value is compared with a wave direction measured by the observer. Successful agreement between measured and estimated wave directions were obtained, when the actual wave was regarded as a long-crested irregular wave. And the power spectra which were obtained by integration of the estimated directional wave spectra also agreed qualitatively with the measured ones with a ship-borne wave recorder.
公益社団法人日本航海学会の論文
1992-03-25