二维弹性平板绕流锁定发生机理研究  

Mechanism research of lock-in on two-dimensional flow around elastic plate

作　　者：贾文超[1] 陈美霞[1] 杨丹[1] 

机构地区：[1]华中科技大学船舶与海洋工程学院,湖北武汉430074

出　　处：《舰船科学技术》2016年第11期28-33,共6页Ship Science and Technology

基　　金：国家自然科学基金资助项目(51179071)

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 successfully captures the lock-in phenomena, and the mechanism was studied. The results suggest that when the vortex shedding frequency is close to the natural frequency of the structure, the surface pressure distribution is consistent with the structure modal, vortex intensity reaches a certain level, the lock-in phenomenon will occur.

关 键 词：锁定 双向流固耦合 涡激共振 

分 类 号：U661.1[交通运输工程—船舶及航道工程]