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 coupled numerical simulation method for the interaction between internal solitary wave and deep sea riser is proposed. The flow field is simulated by using the internal solitary wave numerical tank method. The structural response is calculated by using the finite element method based on the thin shell theory. A real-time transmission method of flow field and structure response data is used to realize the real- Coupled numerical simulation. The deep sea riser load with long aspect ratio of 1 200 under internal solitary wave and its dynamic response are numerically simulated and analyzed. The results show that the internal solitary waves not only cause sudden shear load on the deep-sea riser, but also cause the large deformation response of the riser. Therefore, the influence of the internal solitary wave in the design and application of the deep-sea riser is not ignore. The research shows that this method provides an effective method for studying the dynamic characteristics of deep-sea vertical pipe and the related problems in engineering prediction under the solitary wave.