波浪中における沿岸漁船の動揺について-I : 波浪およびロール・ピッチの解析

概要

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In order to examine the motions of inshore fishing boat in waves, the seakeeping experiments were carried out under three conditions in displacement of the boat, at varying speeds, heading angles and various sea conditions. The roll and pitch angles were obtained using a vertical gyro and the waves were measured using a Ultrasonic wave meter by stopping the boat at anchor. And these recorded data were digitised at 1.0 second intervals and analysed by means of statistical analysis and spectral analysis. From these experiments, we obtained the following results. (1) The wave heights of a record and double amplitude of roll and pitch angles were found to follow nealy Rayleigh distribution. (2) The values of the bandwidth parameter, ε_s, obtained by spectral analysis, lies in the range ε_s=0.34 to ε_s=0.94 for roll angles and in the range ε_s=0.40 to ε_s=0.90 for pitch angles under various boat and sea conditions.
社団法人日本航海学会の論文
1982-08-25