ω^&l;t-4>型波スペクトルの導入と短期長期予測への影響

概要

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The standard ocean wave spectrum is important for short-term prediction and long-term prediction of ships or floating structures in waves. The standard wave spectra used until today are basically based on P-M (Pierson-Moskowitz) type spectrum, that has ω^&l;t-5> shape in high frequency or equilibrium range. Recently, with the observed data, it has been suggested that the shape of spectrum is ω^&l;t-4> instead of ω^&l;t-5> shape at high frequency range. Technical committee of ITTC recommended to investigate the effect of this type of spectrum on ship responses. In this work, after introducing ω^&l;t-4> type spectrum, the resultant investigations are reported for the differences in short-term and long-term predictions of vertical bending moment and vertical acceleration of a typical ship.
社団法人日本船舶海洋工学会の論文