Numerical Study on Vortex Induced Vibration of a Flexible Plate Behind Square Cylinder with Various Flow Velocities  

作　　者：胡世良 鲁传敬 何友声 

机构地区：[1]Department of Engineering Mechanics,Shanghai Jiaotong University [2]MOE Key Laboratory of Hydrodynamics,Shanghai Jiaotong University

出　　处：《Journal of Shanghai Jiaotong university(Science)》2014年第4期488-494,共7页上海交通大学学报（英文版）

基　　金：the National Natural Science Foundation of China(No.10832007);the Shanghai Leading Academic Discipline Project(No.B206)

摘　　要：The vortex induced vibration(VIV) of a flexible plate behind the square head with various flow velocities is simulated. The closely coupling approach is used to model this fluid-structure interaction problem.The fluid governed by the incompressible Navier-Stokes equations is solved in arbitrary Lagrangian-Eulerian(ALE)frame by the finite volume method. The structure described by the equations of the elastodynamics in Lagrangian representation is discretized by the finite element approach. The numerical results show that the resonance occurs when the frequency of vortex shedding from square head coincides with the natural frequency of plate. And the amplitude of both the structure motion and the fluid load keeps increasing with the time. Furthermore, it is also found that in particular range of flow velocity the vibration of the plate would reach a periodical state. The amplitude of plate oscillating increases with the growth of velocity, while the frequency is locked.The vortex induced vibration （VIV） of a flexible plate behind the square head with various flow velocities is simulated. The closely coupling approach is used to model this fluid-structure interaction problem. The fluid governed by the incompressible Navier-Stokes equations is solved in arbitrary Lagrangian-Eulerian （ALE） frame by the finite volume method. The structure described by the equations of the elastodynamics in Lagrangian representation is diseretized by the finite element approach. The numerical results show that the resonance occurs when the frequency of vortex shedding from square head coincides with the natural frequency of plate. And tile amplitude of both the structure motion and the fluid load keeps increasing with the time. Furthermore, it is also found that in particular range of flow velocity the vibration of the plate would reach a periodical state. The amplitude of plate oscillating increases with the growth of velocity, while the frequency is locked.

关 键 词：fluid-structure interaction closely coupling approach vortex induced vibration(VIV) RESONANCE 

分 类 号：TK124[动力工程及工程热物理—工程热物理]