Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

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

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

Mechanical Engineering

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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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

Cite this article

WU Yikai , ZHU Yechen , GONG Shengjie . Flow-Induced Vibration Response of a Flat Plate in a Confined Rectangular Channel[J]. Journal of Shanghai Jiaotong University, 2026 , 60(2) : 331 -337 . DOI: 10.16183/j.cnki.jsjtu.2024.106

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