Experimental investigation on the flow-induced vibration of three tandem roughness cylinders in high Reynolds number flow

被引：0
|
作者：
Li H. [1 ]
Sun H. [1 ]
机构：
[1] College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2024年 / 43卷 / 06期
关键词：
galloping; oscillation responses; three tandem cylinders; vortex-induced vibration;
D O I：
10.13465/j.cnki.jvs.2024.06.030
中图分类号：
学科分类号：
摘要：
The flow-induced vibration (FIV) of three roughness cylinders arranged in tandem was investigated in high Reynolds number flow. The influences of the spring stiffness and the spacing ratio on amplitude responses, frequency responses and displacement response frequency spectrums were analyzed and discussed. Meanwhile, the comparison between the experimental results of three and two tandem roughness cylinders reveals the influence of the number of interference cylinders on the FIV of the disturbed cylinder. The results show that in the initial branch, the shielding effect of the upstream cylinder on the downstream cylinder is vigorous, whereas in the upper branch, the phenomenon that the amplitude of the downstream cylinder is higher than that of the upstream cylinder appears. In the upper branch and the transition region, increasing the number of the downstream interference cylinders is able to decrease the oscillation frequency of the upstream cylinder. In the vortex-induced vibration region, the increase in the number of downstream interference cylinders scarcely affects the amplitude of the upstream cylinder. In the galloping region, the increase in the number of upstream interference cylinders tends to reduce the vibration amplitude of the downstream cylinder, and this effect becomes weaker with the increasing of stiffness. The influence of the spacing ratio on the FIV of three tandem roughness cylinders is obvious. © 2024 Chinese Vibration Engineering Society. All rights reserved.
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页码：280 / 287and319
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