半潜式海洋平台的周期内波载荷分析

基于半潜式海洋平台基本结构参数和南海海洋环境条件参数,建立海洋周期内波作用下的半潜式平台内波载荷计算模型。采用解析方法,分别给出波长、波高和密度跃层位置等对周期内波载荷的影响及作用力特点,并分析了相位差的影响。对半潜式平台存在较大威胁的海洋周期内波主要是波长较长、振幅较大且密度跃层位置接近于水面的内波;密度跃层位置对平台受力影响较大,相位差对周期内波载荷的影响可以忽略。

Periodical Internal Wave Load Analysis for the Semi-submersible Platform

Based on the structural parameters of a semi-submersible platform and oceanic environmental data of the South China sea(SCS),a numerical model was set up for wave loads analysis of periodical internal waves.The effect of wavelength,wave height,the location of pycnocline and the wave load properties were researched,and the effect of wave phase difference was analyzed.It was found that the more dangerous internal periodic waves are those waves with large amplitude,wavelength and shallower pycnocline location,the location of pycnocline is more important while the effect of phase difference can be neglected.