张紧器系统对顶张式立管固有频率的影响研究  

Influence analysis of tensioner system on natural frequency of top tensioned riser

作　　者：吴晨 余建星[1,2] 余杨[1,2] 陈柏全[1,2,3] 徐立新[1,2] WU Chen;YU Jianxing;YU Yang;CHEN Baiquan;XU Lixin(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China;Collaborative Innovation Center for Advanced Ship and Deep-sea Exploration,Shanghai 200240,China;Industry Research Center,China Institute of Marine Technology and Economy,Beijing 100081,China)

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300350 [2]上海交通大学高新船舶与深海开发装备协同创新中心,上海200240 [3]中国船舶工业综合技术经济研究院经济与市场研究中心,北京100081

出　　处：《振动与冲击》2020年第11期209-216,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金(51609169;51779173);广西科技重大专项(桂科AA17292007)。

摘　　要：采用Euler-Bernoulli梁模型建立立管的水平运动控制方程,并应用Galerkin方法化简求得立管的固有频率。考虑平台的升沉运动,对比了推导的张紧器详细模型和工程常用的简化模型下立管的固有频率。最后基于推导的详细模型,研究了张紧器结构参数对立管固有频率的影响。结果表明:立管固有频率受浮体升沉运动的影响,浮体升沉运动会改变立管的共振特性,引起立管共振点的迁移和转变;采用不同张紧器模型,立管固有频率存在差异,且该差异随着固有频率阶次的增大而增大;立管固有频率受张紧器结构参数的影响,在实际工程中应合理选择张紧器的参数大小,以避免发生参激共振和涡激共振。The lateral vibration equation of top tensioned riser was derived based on the Euler-Bernoulli beam model,and the natural frequency of the riser was studied by the Galerkin method.Considering the heave motion of platform,the natural frequency of riser calculated by the detailed tensioner model proposed in this paper was compared with that calculated by the conventional simplified model used in the engineering.At last,the impact of the tensioner structure parameters on the natural frequency of riser was studied based on the proposed model.The results show that the natural frequency of riser is influenced by the heave motion of platform.The resonance characteristics of riser may change with the heave motion of platform.The natural frequency of riser differs with different tensioner models,and the difference increases with increase of the natural frequency order.The natural frequency of riser is impacted by the tensioner structure parameters,and the tensioner parameters should be chosen reasonably to avoid parametric resonance and vortex-induced vibration of riser.

关 键 词：顶张式立管 张紧器系统 平台运动 固有频率 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]