畸形波作用下半潜式平台波浪爬升与气隙响应特性

半潜平台的波浪爬升与气隙响应是设计过程中的重要考量因素。为探究随机波浪场中畸形波对半潜平台波浪爬升及气隙响应的影响,将含畸形波的随机波浪试验与一般随机波浪试验结果进行了对比研究分析。对模型试验测得的运动以及监测点处的波浪爬升及气隙进行频谱分析以及极值统计分析。研究发现,纵荡和纵摇的极大值主要受畸形波的影响而显著增大,纵荡、垂荡以及纵摇响应谱几乎不受单个畸形波影响;波浪爬升与气隙的极大值受到畸形波的影响而增大,同时,畸形波对气隙响应谱造成极大影响,增强了波浪爬升与气隙响应的非线性性。

Wave run-up and air-gap response characteristics of semi-submersible platform under action of rogue waves

The wave run-up and air-gap response of semi-submersible platform are important factors in the design process. In order to study the influence of rogue waves on the wave run-up and air-gap response of semi-submersible platform in random wave field, the results of random wave test with rogue wave and general random wave test are compared and analyzed in this thesis. We performed spectrum analysis and extreme statistical analysis of the motion and the wave run-up and air-gap at the monitoring point, which were measured in the model test. The study shows that the maximum values of sway and pitch are mainly affected by the rogue wave and increase significantly. The response spectrums of surge, heave and pitch are almost unaffected by a single rogue wave. The maximum values of wave run-up and air-gap are increased by the influence of rogue wave. And the rogue wave has a great influence on the air-gap response spectrum, enhancing the nonlinearity of wave run-up and air-gap response.