截断柱群波浪绕射性能的时域数值分析

随着海洋油气资源开发力度的加大，半潜平台等柱群结构的强度校核及设计应用、波浪与截断柱群之间的干扰作用越来越被人们所重视．运用时域三维边界元法对截断立柱群在规则和不规则波中的波浪绕射f生能进行了数值分析，远方辐射面上采用多次透射边界条件，自由面上采用积分格式的自由面边界条件．为满足半潜平台设计中对准确预报载荷和柱群周围波高的要求，将对截断面形状、浪向角、柱间距和埋深比对柱群中单柱所受波浪力的影响进行研究，探讨考虑柱群间干扰作用后对柱群周围波浪场的影响．

Numerical analysis of diffraction-wave to truncated cylinder arrays in time-domain

With the increase of development efforts of offshore oil and gas resources, we are paying more and more attention to the strength check of column group structure such as semi-submersible platform, applications in design, and the interference effects between wave and truncated cylinder arrays. The wave diffraction performance of truncated cylinder arrays in regular and irregular waves is calculated numerically by using a time-domain three-dimensional boundary element method. A multi-transmitting formula method is employed on the far radiation surface and integral form free surface boundary condition is applied on the free surface. In order to meet the requirements of accurately forecasting load and wave height around the column group in the submersible platform, influence of the cross sectional shape, wave angle, distance between cylinders and depth ratio on the wave force of single column among the column group is studied. The interaction effect of column group after disturbance on the wave field around columns is discussed.