二维弹性平板绕流锁定发生机理研究

摘要

本文采用双向流固耦合来研究一端固定二维平板涡激振动特性，通过动网格技术来实现流场和结构之间力和位移的相互传递。对不同雷诺数下平板绕流涡分离进行计算，成功捕捉到了锁定现象，并对其发生机理进行研究。计算结果表明，当涡脱落频率接近结构固有频率、结构表面压力分布与结构模态一致、尾涡强度达到一定水平，即可产生锁定现象。%Vortex-induced vibration of a cantilever plate is investigated numerically based on two-way fluid-structure interaction, which is achieved through the exchange of force and displacement data between the fluid and the structure field. In this work, vortex-induced vibration of a cantilever plate at different Reynolds number is simulated, simultaneously suc-cessfully captures the lock-in phenomena, and the mechanism was studied. The results suggest that when the vortex shed-ding frequency is close to the natural frequency of the structure, the surface pressure distribution is consistent with the struc-ture modal, vortex intensity reaches a certain level, the lock-in phenomenon will occur.