窄矩形流道内平板流致振动响应

doi:10.16183/j.cnki.jsjtu.2024.106

上海交通大学学报 ›› 2026, Vol. 60 ›› Issue (2): 331-337.doi: 10.16183/j.cnki.jsjtu.2024.106

窄矩形流道内平板流致振动响应

吴逸恺, 朱晔晨, 龚圣捷()

上海交通大学核科学与工程学院,上海 200240

收稿日期:2024-03-28 修回日期:2024-05-04 接受日期:2024-05-29 出版日期:2026-02-28 发布日期:2026-03-06
通讯作者: 龚圣捷 E-mail:gsj@sjtu.edu.cn.
作者简介:吴逸恺(2000—),硕士生,从事流致振动与沸腾传热研究.

Flow-Induced Vibration Response of a Flat Plate in a Confined Rectangular Channel

WU Yikai, ZHU Yechen, GONG Shengjie()

School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received:2024-03-28 Revised:2024-05-04 Accepted:2024-05-29 Online:2026-02-28 Published:2026-03-06
Contact: GONG Shengjie E-mail:gsj@sjtu.edu.cn.

摘要/Abstract

摘要：

本文设计了窄流道内两端固定的矩形平板流致振动实验,获得了该平板的振动响应特性,结果表明导致平板振动的物理机理为湍流激振和涡激振动.湍流激发平板的一阶固有频率响应,激励随流速的增大而增大.涡激振动频率与流速呈线性正相关关系,实验范围内得到的斯特劳哈尔数Sr=0.24.当泄涡频率接近固有频率时,产生“锁定”现象并引发共振,且存在非线性倍频响应.随着流速的变化,平板的一阶固有频率没有明显变化趋势.此外,湿模态分析表明,声固耦合法计算得到的结果与实验吻合较好.

关键词: 矩形平板, 流致振动, 湿模态, 声固耦合

Abstract:

Experiments on flow induced vibration of a rectangular flat plate with two ends fixed in a confined channel are conducted, and vibration response characteristics of the plate are obtained. The results show that the main physical mechanisms of vibration are turbulent-induced vibration and vortex-induced vibration. The turbulence excites the response of the first natural frequency of plate and is amplified with the increasing flow velocity. The frequency of vortex-induced vibration shows a linear increase with the flow velocity, and the Strouhal number Sr=0.24 within the test range. The ‘lock-in’ phenomenon and resonance occur when the vortex shedding frequency approaches the natural frequency, and non-linear frequency-doubling response appears. The first natural frequency of the flat plate shows no obvious trend with changes in flow velocity. In addition, the wet modal analysis based on acoustic-solid coupling method were conducted and the predicted results show a good agreement with the experimental values.

Key words: rectangular flat plat, flow-induced vibration, wet modal, acoustic-solid coupling

中图分类号:

O353.4

吴逸恺, 朱晔晨, 龚圣捷. 窄矩形流道内平板流致振动响应[J]. 上海交通大学学报, 2026, 60(2): 331-337.

WU Yikai, ZHU Yechen, GONG Shengjie. Flow-Induced Vibration Response of a Flat Plate in a Confined Rectangular Channel[J]. Journal of Shanghai Jiao Tong University, 2026, 60(2): 331-337.

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编号	节点数	湿模态一阶频率/Hz	偏差/%	湿模态二阶频率/Hz	偏差/%
1	23 887	947.1	0.92	3 266.0	0.52
2	44 945	943.1	0.49	3 258.2	0.28
3	80 515	938.5	—	3 249.2	—

方法	频率/Hz	与实验值偏差/%
实验	961.0	—
ANSYS声固耦合	938.5	2.3
Haddara等^[4]	909.6	5.4

窄矩形流道内平板流致振动响应

Flow-Induced Vibration Response of a Flat Plate in a Confined Rectangular Channel

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