海洋内孤立波中顶张力立管的动力响应研究  

Research on Dynamic Response of Top Tensioned Riser in Ocean Internal Solitary Wave

作　　者：姜海[1] 郭海燕[1] 赵婧[1] 张林[1] 王伟[1] 

机构地区：[1]中国海洋大学工程学院,山东青岛266100

出　　处：《海洋湖沼通报》2017年第3期60-67,共8页Transactions of Oceanology and Limnology

基　　金：国家自然科学基金(51279187);山东省科技重大专项(2015ZDZX04003)资助

摘　　要：基于商业软件Fluent,建立大振幅海洋内孤立波数值水槽,获取内孤立波波致水平流速和水平加速度沿垂向的分布,结合改进的Morison公式,计算内孤立波对立管的作用,采用有限单元法在时域中对内孤立波作用下顶张力立管的动力响应进行数值模拟,并就顶张力大小、内流密度、内孤立波振幅对立管动力响应的影响进行探讨。结果表明,内孤立波对顶张力立管产生强剪切作用,使立管发生较大变形,产生较高应力,并在波谷到达时刻出现最大位移和应力,立管上层流体部分的位移和应力明显大于下层流体部分的位移和应力。Based on commercial software FLUENT,a numerical flume of ocean internal solitary wave of large amplitude is established,in which vertical distributions of horizontal velocity and acceleration induced by internal solitary wave are gained.Then combined with modified Morison formula,the internal solitary wave force on top tensioned riser is calculated,and the finite element method are adopted to simulate the dynamic response of top tensioned riser under internal solitary wave in time domain.The influences of the top tension,internal flow and wave amplitude are discussed in the end.The results show that the internal solitary wave produces strong shearing action on the riser,making severe deformation and high stress occur in the riser.The maximum displacement and stress appear when wave trough arrives,and the displacement and stress in the upper fluid are greater than that in the lower part of the fluid.

关 键 词：内孤立波 数值水槽 Morison公式 顶张力立管 动力响应 

分 类 号：O353.2[理学—流体力学]