【作者】 王恩浩； 徐万海； 高喜峰； 吴昊恺；

【Author】 WANG En-hao;XU Wan-hai;GAO Xi-feng;WU Hao-kai;State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University;

【机构】 天津大学水利工程仿真与安全国家重点实验室；

【摘要】 本研究运用三维流固耦合数值模拟的方法研究了均匀流中顶张力立管涡激振动。立管参数选用埃克森美孚公司在挪威海洋技术研究院开展的顶张力立管涡激振动模型试验中的立管模型参数。模型长径比为L/D=481.5,质量比为m~*=2.23。数值模拟中立管的结构阻尼设置为0,顶张力为T=817N。立管两端铰支并可在顺流向与横流向自由运动。数值模拟结果与试验数据进行了对比,吻合程度较好。本研究还着重分析了立管的涡激振动响应特性及尾迹旋涡脱落模式。更多还原

【Abstract】 Combined in-line and cross-flow vortex-induced vibration(VIV) of a top-tensioned riser in uniform currents is studied using a fully three-dimensional fluid-structure interaction simulation approach.The model vertical riser tested at the MARINTEK by ExxonMobil is considered.The model riser has a length-to-diameter ratio L/D=481.5 and a mass ratio m~*=2.23.The structural damping is set to zero in the present simulation.A top tension T=817 N is applied to the top end of the riser.The riser is pinned at both ends and free to move in both the in-line and cross-flow directions.The numerical results are compared with the experimental data and good agreement has been reached.Detailed analyses of the VIV response characteristics and the wake vortex shedding modes are carried out.更多还原