船体波浪計化法による波浪モニタリングについて : 上下加速度と船載式波高計による推定精度の比較

概要

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Bayesian modelling procedure is applied to an inverse problem of how to estimate the directional wave spectrum from actual ship motion data. And, the new techniques were introduced into the estimating calculation. Using these techniques, a considerable number of measurement data can be analyzed automatically. In order to investigate the practical use of the present method, two sets of measurement data were used for the estimation. The one consists of the data of pitching, rolling and ship borne wave sensor, and the other one consists of the data of pitching, rolling and vertical bow acceleration. These two types of estimates were examined by the typical indices; they were significant wave heights, wave periods and wave directions. Generally, the estimated results using the wave sensor data showed good agreements with visual observations and it has been shown that the use of acceleration data would cause of estimation errors in the low frequency region.
2000-03-25