二阶波浪力和聚焦位置对畸形波作用下张力腿平台动力响应的影响研究  

Effects of second-order wave force and focusing location on dynamic response of a tension leg platform under freak wave

作　　者：常爽[1] 黄维平[1] 魏东泽 宋虹[1] CHANG Shuang;HUANG Weiping;WEI Dongze;SONG Hong(Engineering College,Ocean University of China,Qingdao 266100,China;Harbor Laboratory,Zhejiang Ocean University,Zhoushan 316000,China)

机构地区：[1]中国海洋大学工程学院,山东青岛266100 [2]浙江海洋学院港航实验室,舟山316000

出　　处：《振动与冲击》2020年第17期254-260,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金(51239008)。

摘　　要：通过波浪聚焦和波列叠加模型模拟生成了满足畸形波定义的畸形波。求解畸形波作用下张力腿平台动力响应,并分析二阶波浪力和畸形波聚焦位置对张力腿平台动力响应的影响。结果表明:畸形波会引起张力腿平台纵荡、垂荡和纵摇的大幅值运动;二阶差频波浪力会引起纵荡方向的大幅振荡,纵摇运动主要由二阶和频波浪力贡献,垂荡运动则由二阶和频波浪力引起的垂向高频振荡和二阶纵荡差频力引起的大幅值下沉运动组成;因不同频率波浪力之间的相位差,使得张力腿平台纵荡、垂荡响应极值与纵摇响应极值分别发生在畸形波作用在后立柱和平台中心时。Here,based on the wave focusing and wave time series superposition model,freak wave time series satisfying definition of freak wave were generated.Dynamic response of a tension leg platform(TLP)was solved under freak wave to analyze effects of second-order wave force and freak wave focusing location on the TLP’s dynamic response.Results showed that freak wave can cause the TLP’s large amplitude motions of surge,heave and pitch;second-order difference frequency wave force can cause large oscillations in surge direction;pitch motion is caused mainly by second-order sum frequency wave force’s contribution;heave motion is composed of vertical high-frequency oscillation caused by second-order sum frequency wave force and large amplitude sinking movement caused by second-order surge difference frequency wave force;due to phase differences among wave forces with different frequencies,the TLP’s extreme value responses of surge,heave,and pitch appear during freak wave acting on rear column and center of the TLP.

关 键 词：畸形波 张力腿平台(TLP) 二阶波浪力 聚焦位置 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]