考虑流固耦合的大柔性圆柱体涡激振动非线性时域模型

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (9) : 140-143.

论文

考虑流固耦合的大柔性圆柱体涡激振动非线性时域模型

黄维平，刘娟，唐世振

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A nonlinear model of vortex induced vibration of flexible cylinder with fluid-structure interaction

HUANG Wei-ping, LIU Juan, TANG Shi-zhen

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摘要

基于流固耦合的涡激升力模型和Morison方程，提出了一个非线性的圆柱体涡激振动时域分析模型。该模型不仅考虑了脉动拖曳力诱发的顺流向涡激振动，而且考虑了横向的流固耦合问题。该模型物理意义清楚，其非线性包括流体阻尼的非线性性质和涡激升力与圆柱体响应的相关性，这些非线性性质是该模型区别于现有涡激振动分析模型的主要特征。分析表明，该模型较好地反映了圆柱体涡激振动的本质，与现有的商业软件吻合较好。

Abstract

A non linear model of vortex-induced vibration (VIV) of cylinders is proposed based on a model of VIV lift force on cylinder in the paper. Not only is the vibration in line with the flow due to vortex shedding included in the model, but also the fluid-structure interaction in transverse is considered. The physical concept in the model is clear and its response-depend lift force together with non linear damping are its characteristics different from other VIV models. The numerical analysis show that the model can describe the VIV of deepwater risers pretty well and be agreed with the calculated results using commercial code.

导出引用

黄维平;刘娟;唐世振. 考虑流固耦合的大柔性圆柱体涡激振动非线性时域模型[J]. 振动与冲击, 2012, 31(9): 140-143

HUANG Wei-ping;LIU Juan;TANG Shi-zhen. A nonlinear model of vortex induced vibration of flexible cylinder with fluid-structure interaction[J]. Journal of Vibration and Shock, 2012, 31(9): 140-143