IMECH-IR  > 流固耦合系统力学重点实验室
Alternative TitleImpact of top-end heave on vortex-induced vibration of submarine riser for deep-water platform
陈伟民; 李依伦; 姜春晖; 郭双喜
Source Publication海洋工程
Other AbstractThe dynamic coupling between top-end motion (heave) and top-tensioned riser's vortex-induced vibration (VIV) is explored by our finite element simulations. First,a coupled hydrodynamic force approach,concerning vortex-induced lift force along with fluid drag force,is developed,which regards the interaction between instantaneous riser motion and fluid dynamics. The structural stiffness is changing during dynamic response. Then the dynamic responses of the integrated system involving both floating top-end and a top-tensioned riser undergoing VIV are presented to examine impacts of platform heave,in terms of heave frequencies and mode order number,on riser's VIV. Our numerical results show that the dynamic response displacement of riser becomes several times larger than the displacement for the case without top-end motion. The impact of top heave on riser's VIV gets larger as modal order number drops. Moreover,an interesting phenomenon,called the mode transition,is observed particularly at lower vibration frequencies due to the natural dynamic characteristics of the slender riser. Based on our results,it is suggested that,in practices of riser design,a combined excitation needs to be considered for accurate dynamic analysis of slender marine structures subjected to both top-end motion and VIV.
KeywordParameter Excitation Heave Vortex-induced Vibration Riser Offshore Platform Dynamic Response
Indexed ByCSCD
WOS Keywordparameter excitation ; heave ; vortex-induced vibration ; riser ; offshore platform ; dynamic response
Funding Organization国家自然科学基金重点项目 ; 国家自然科学基金面上项目
Citation statistics
Cited Times:4[CSCD]   [CSCD Record]
Document Type期刊论文
Recommended Citation
GB/T 7714
陈伟民,李依伦,姜春晖,等. 深水浮式平台垂荡运动与水下柔性立管涡激振动的动力耦合[J]. 海洋工程,2016,34(3):1.
APA 陈伟民,李依伦,姜春晖,&郭双喜.(2016).深水浮式平台垂荡运动与水下柔性立管涡激振动的动力耦合.海洋工程,34(3),1.
MLA 陈伟民,et al."深水浮式平台垂荡运动与水下柔性立管涡激振动的动力耦合".海洋工程 34.3(2016):1.
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