涡激振动抑制装置建模与仿真分析

Modeling and simulation analysis of vortex induced vibration suppression device

基于有限元模态计算、计算流体力学(CFD)方法、结构动力学理论以及嵌套网格技术,同时考虑涡激振动抑制装置来流向和横流向振动,建立涡激振动抑制装置的流固耦合动力学仿真模型,预测螺旋列板涡激振动抑制装置对海洋立管涡激振动的抑制效果。通过与国外文献实验数据对比,验证本文数值方法的准确性。采用本文的螺旋列板结构参数进行仿真计算,螺旋列板横向振幅抑制效率达到98%以上,拖拽力系数小于1.6,可以满足工程需求。

Based on finite element modal calculation,computational fluid dynamics(CFD)methods,structural dynam-ics theory,and nested grid technology,a fluid structure coupling dynamic simulation model of the vortex induced vibration suppression device was established,taking into account the flow direction and transverse vibration of the vortex induced vi-bration suppression device.The suppression effect of the spiral plate vortex induced vibration suppression device on the vor-tex induced vibration of marine risers was predicted.The accuracy of the numerical method proposed in this paper was veri-fied by comparing it with experimental data from foreign literature.Using the structural parameters of the spiral plate in this article for simulation calculation,the lateral amplitude suppression efficiency of the spiral plate reaches over 98%,and the drag force coefficient is less than 1.6,which can meet engineering requirements.