二维弹性平板绕流锁定发生机理研究 |
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引用本文: | 贾文超,陈美霞,杨丹.二维弹性平板绕流锁定发生机理研究[J].舰船科学技术,2016(11):28-33. |
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作者姓名: | 贾文超 陈美霞 杨丹 |
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作者单位: | 华中科技大学 船舶与海洋工程学院,湖北 武汉,430074 |
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基金项目: | 国家自然科学基金资助项目(51179071) |
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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。
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关 键 词: | 锁定 双向流固耦合 涡激共振 |
Mechanism research of lock-in on two-dimensional flow around elastic plate |
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Abstract: | 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. |
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Keywords: | lock-in two-way fluid-structure interaction vorticity induced vibration |
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