Numerical simulation on tip effect of vortex-induced vibration around an upright cylinder

被引：0
|
作者：
Ding Y. [1 ]
Yu Z. [1 ]
Mao Y. [2 ]
Wang J. [2 ]
Shu Z. [2 ]
机构：
[1] School of Aeronautics and Astronautics, Shanghai JiaoTong University, Shanghai
[2] Shanghai Aerospace System Engineering Research Institute, Shanghai
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2021年 / 40卷 / 20期
关键词：
Cantilever cylinder; Numerical simulation; Tip effect; Vortex-induced vibration;
D O I：
10.13465/j.cnki.jvs.2021.20.029
中图分类号：
学科分类号：
摘要：
The vortex-induced vibration of the finite-length cantilever cylindrical structure may occur under the wind load. At the same time, vortex-induced vibration may also occur at high wind speeds beyond the range of the lock vibration. The mechanism of this vortex-induced vibration phenomenon is not yet clear. Aiming at the common vortex-induced vibration phenomenon and the vortex-induced vibration phenomenon under high wind speed, a two-way fluid-structure interaction numerical simulation method was established for analysis. The results show that the numerical simulation method can better show the vibration characteristics of the cylinder under the wind load and the three-dimensional characteristics of the fluid flow in the cylinder span. By performing the power spectral density analysis on the displacement time history curve of the center point of the cylinder top surface and the lift time history curve on the coupling surface, a common vortex-induced vibration frequency response that is in good agreement with the experimental results in the literature was obtained. According to the lateral vibration characteristics and three-dimensional flow characteristics of the cylinder motion, it was found that when the cylinder is at high wind speed, there is a vortex frequency close to the natural frequency of the structure at the tip of the cylinder, which reveals the mechanism of vortex-induced vibration at high wind speed. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：232 / 239and254
相关论文
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