Wind tunnel test study on flow-induced vibration of parallel dual-rigid cylinder

被引：0
|
作者：
Hu Z. [1 ,2 ]
Wang J. [2 ]
Sun Y. [2 ]
Zheng H. [2 ]
机构：
[1] School of Building Engineering, Huanghuai University, Zhumadian
[2] School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2023年 / 42卷 / 09期
关键词：
flow-induced vibration; parallel cylinders; vortex-induced vibration ( VIV); wake coupled vortex-induced vibration ( WCVIV); wind tunnel test;
D O I：
10.13465/j.cnki.jvs.2023.09.022
中图分类号：
学科分类号：
摘要：
Here,flow-induced vibration of parallel dual-rigid cylinder with elastic supports was studied with wind tunnel tests. In tests,Reynolds number range Re =3 200 - 36 200,cylinder spacing ratio S/D = 1.5 -4.0 where S is the distance between centers of two cylinders and D is the diameter of two cylinders. The results showed that with changes of S/D,vibration amplitudes of parallel dual-cylinder present two modes of vortex-induced vibration ( VIV) and wake coupled vortex-induced vibration ( WCVIV) ; WCVIV occurs when S/D 0, at this time, interaction between two cylinders is stronger, vibration amplitude responses of two cylinders are inconsistent, vibration displacements reveal in-phase or anti-phase coupled feature,vortex shedding frequencies at symmetrical points in cylinder' s wake field are also different, and wake is asymmetric; VIV occurs when S/D =3. 5 -4.0, at this time, two cylinders are independent of each other,their vibration amplitudes and vortex shedding frequencies are almost the same,wake asymmetry disappears, and phase difference between two cylinders' vibration displacements is no longer approximately equal to a constant value, but periodically "scratches" with time; whether WCVIV or VIV occurs, the main frequency of vibration frequencies is locked at 1 times cylinder' s natural frequency. © 2023 Chinese Vibration Engineering Society. All rights reserved.
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页码：197 / 204
页数：7
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