上海交通大学学报

上海交通大学学报 >

2026 , Vol. 60 >Issue 2: 331 - 337

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2024.106

机械与动力工程

窄矩形流道内平板流致振动响应

  • 吴逸恺 ,
  • 朱晔晨 ,
  • 龚圣捷
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  • 上海交通大学 核科学与工程学院,上海 200240
吴逸恺(2000—),硕士生,从事流致振动与沸腾传热研究.
龚圣捷,副教授,博士生导师,电话(Tel.):021-34206766;E-mail:gsj@sjtu.edu.cn.

收稿日期: 2024-03-28

  修回日期: 2024-05-04

  录用日期: 2024-05-29

  网络出版日期: 2024-06-13

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

  • WU Yikai ,
  • ZHU Yechen ,
  • GONG Shengjie
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  • School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received date: 2024-03-28

  Revised date: 2024-05-04

  Accepted date: 2024-05-29

  Online published: 2024-06-13

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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

本文引用格式

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 . DOI: 10.16183/j.cnki.jsjtu.2024.106

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

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