内孤立波与深海立管相互作用数值模拟  

Numerical simulation of interaction of internal solitary waves with deep-sea risers

作　　者：刘碧涛[1] 李巍[1] 尤云祥[1] 曲衍 范模 

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240 [2]中海油研究总院,北京100027

出　　处：《海洋工程》2011年第4期1-7,50,共8页The Ocean Engineering

基　　金：国家863计划资助项目(2008AA09Z316,2008AA09Z313,SQ2009AA09z3487713);中海油-上海交大“深水工程技术中心”综合科研课题资助项目

摘　　要：提出了一种对内孤立波与深海立管相互作用耦合数值模拟方法。流场采用内孤立波数值水槽方法进行模拟,结构响应采用基于薄壳理论的有限元方法进行计算,采用一种将流场和结构响应数据进行实时传输的方法,实现了流体与固体之间的耦合数值模拟。对内孤立波作用下某长径比为1 200的深海立管载荷及其动力响应特性进行了数值模拟与分析。结果表明内孤立波不仅会对深海立管产生突发性剪切载荷作用,而且还会使立管产生大幅度变形响应现象,因此在深海立管设计与应用中,内孤立波的影响是不可忽视的。研究表明,该方法为研究内孤立波作用下深海立管动力特性及其工程预报相关问题提供了一种有效的手段。A coupling simulation method is presented for solving the interaction of internal solitary waves with deep-sea risers where flows due to internal solitary waves are resolved by use of the numerical flume method,and structure responses are analyzed by use of the finite element method based on the thin shell model.Such coupling simulations of the fluid-structure interaction are accomplished by use of a novel method with the on-line transmission between fluid dynamic load and structure response data.The load and dynamic characteristics are numerically simulated and analyzed for a long flexible riser（length to diameter ratio =1 200） which is subjected to a shear flow profile induced by the internal solitary wave.Results show that internal solitary waves will give rise to the sudden shear load,as well as the large deformation for the riser,therefore the influence of internal solitary waves on the dynamic behaviours of deep-sea risers can not be neglected in their design and application.It can be concluded that the present method can be used as an effective tool in analyzing and predicting the dynamic characteristics for long deep-sea risers due to internal solitary waves.

关 键 词：内孤立波 深海立管 数值水槽 动力响应 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]