波群作用于垂直桩柱的峰力统计性质

STATISTICAL CHARACTERISTICS OF PEAK FORCES ON A VERTICAL CYLINDER DUE TO WAVE GROUPS

研究具有窄谱和Ｗｅｉｂｕｌｌ波高分布的波群对非线性桩柱系统作用力的统计性质。求得了桩桩的波浪峰力的各种特征值及其比值。指出这些数值不仅是阻力一惯性力参数ｂＨ的函数，也随着波群因子而变化。本文模式更具广泛性。文中给出了一系列计算图表，可从理论计算波群作用于桩柱的波浪峰力。

A Stage-by-stage probability density function of peak forces is theoretically derived in this paper when wave groups with a narrow band spectrum having the Weibull distribution of wave height act on the nonlinear system of vertical cylinder.Then various characteristic values and their ratioes of peak forces on the cylinder are obtained.These values are not only a function of the drag-inertia parameter but also vary with the Weibull shape factor, hence with the wave groupiness factor,because the former is linearly related to the latter. Borgman's model is a special case(m=2) of this theoretical model.The calculated values of this model are in good agreement with the experimental values.A series of figures and tables are given from which the peak forces on the cylinder due to wave groups can be theoretically caloulated.