内孤立波作用下缓波形立管动力特性研究  

Dynamic characteristics of lazy wave risers under internal solitary waves

作　　者：余杨[1,2] 刘晓伟[1,2] 李振眠 孙若飞 杨政龙 徐立新[1,2] YU Yanga;LIU Xiao-weia;LI Zhen-miana;SUN Ruo-feia;YANG Zheng-onga;XU Li-xina(State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation,Tianjin University,Tianjin 300072,China;Tianjin Key Laboratory of Port and Ocean Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学水利工程智能建设与运维全国重点实验室,天津300072 [2]天津大学天津市港口与海洋工程重点实验室,天津300072

出　　处：《船舶力学》2024年第6期803-817,共15页Journal of Ship Mechanics

基　　金：国家自然科学基金面上项目(52071234);中国博士后科学基金面上项目(2022M722349);天津市科技计划项目(21JCQNJC00350)。

摘　　要：我国南海活跃着大量内孤立波,严重威胁海洋工程作业的安全。本文采用向量式有限元方法分析内孤立波作用下深海缓波形钢悬链立管动力特性,建立考虑触地段土反力和内孤立波载荷的缓波形钢悬链立管动力模型,根据mKdV方程求解内孤立波载荷,基于向量式有限元梁单元编制Fortran计算程序。分析不同入射角内孤立波作用下立管的位移极值、张力及弯矩变化趋势,并比较缓波形立管与简单钢悬链立管在内孤立波作用下的动力特性。结果表明:内孤立波作用下,缓波形钢悬链立管会有较大的位移响应,特别是顶部悬垂段会有较大的水平位移;缓波形立管比简单钢悬链立管有更显著的张力变化幅值,有更加复杂的弯矩变化趋势。The large number of internal solitary waves in the South China Sea seriously threaten the safety of offshore engineering operations.In this paper,the vector form intrinsic finite element(VFIFE)method was used to analyze the dynamic characteristics of deep-sea steel lazy wave risers(SLWR)under the action of in-ternal solitary waves.The dynamic model of a deep-sea steel lazy wave riser considering soil reaction in touchdown zone and internal solitary wave load was established.The internal solitary wave load was solved according to the mKdV equation.Fortran calculation program was compiled based on vector form intrinsic fi-nite element beam element.The displacement extremum and variation trends of tension and bending moment of a riser under different incident angles were analyzed.The dynamic characteristics of a steel lazy wave riser and a simple steel catenary riser under internal solitary waves were compared.The results show that under the action of internal solitary waves,the steel lazy wave riser will have a greater displacement response,espe-cially the upper section will have a greater horizontal displacement.Compared with the simple steel catenary riser,the steel lazy wave riser has a more significant tension variation amplitude and a more complex bending moment variation trend.

关 键 词：缓波形钢悬链立管 内孤立波 向量式有限元 KdV理论 动力响应 

分 类 号：P756.2[天文地球—海洋科学] TU312.1[建筑科学—结构工程]