基于单向求解、双向流固耦合的悬臂平板绕流涡激振动特性对比研究

本文采用双向流固耦合研究一端固定的二维平板(展向无限长)涡激振动特性,通过流场和结构之间力和位移的相互传递来实现双向耦合。同时,对不同雷诺数下的平板绕流涡激振动进行了计算,并与单向求解算法进行了对比。计算结果表明,当涡脱落频率接近结构固有频率时,将出现频率锁定现象,同时结构将产生极大的位移响应。在锁定雷诺数区域中,双向流固耦合结构位移响应明显小于单向求解算法,而在其他非锁定区间,两种算法差别较小。

Analysis of vortex-induced vibration of a cantilever plate based on one-way and two-way fluid-structure interaction

Vortex-induced vibration of a cantilever plate is investigated numerically based on two-way fluidstructure interaction,which is achieved through the exchange of force and displacement data between the fluid and the structure field.In this work,the vortex-induced vibration of a cantilever plate at different Reynolds numbers is simulated,the results of which are compared with that obtained by one-way fluid-structure interaction simultaneously.The results suggest that when the vortex shedding frequency coincides with a natural frequency of the structure system,the structure will vibrate at large transverse displacement amplitudes.In the lock-in region,the displacement response is significantly smaller than that of the one-way coupling algorithm,while in other regions,the difference between the two algorithms is small.