Vortex-induced vibration forever even with high structural damping

被引：14
作者：
Han, Peng [1 ]
de Langre, Emmanuel [2 ]
Thompson, Mark C. [3 ]
Hourigan, Kerry [3 ]
Zhao, Jisheng [3 ,4 ]
机构：
[1] Tsinghua Univ, Dept Engn Mech, AML, Beijing 100084, Peoples R China
[2] Ecole Polytech, CNRS, Inst Polytech Paris, LadHyX, F-91128 Palaiseau, France
[3] Monash Univ, Dept Mech & Aerosp Engn, Fluids Lab Aeronaut & Ind Res FLAIR, Clayton, Vic 3800, Australia
[4] Univ New South Wales, Sch Engn & Technol, Canberra, ACT 2600, Australia
来源：
JOURNAL OF FLUID MECHANICS | 2023年 / 962卷
基金：
澳大利亚研究理事会;
关键词：
flow-structure interactions; vortex instability; vortex shedding; FLOW-INDUCED VIBRATION; CIRCULAR-CYLINDER; SECTION; ANGLES; MASS;
D O I：
10.1017/jfm.2023.268
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
This study investigates the effect of structural damping on vortex-induced vibration (VIV)of a circular cylinder when the mass ratio is below its critical value. It is confirmedby water-channel experiments and a reduced-order model (ROM) that the previouslyidentified phenomenon of VIV forever, i.e. resonance oscillations at any reduced velocity,persists even with high structural damping. Of interest, the ROM results reveal that thewake mode for VIV forever is unstable with a constant positive growth rate with increasingreduced velocity, while the experimental results suggest that VIV forever is associatedwith a synchronisation between the non-stationary cylinder vibration frequency and thevortex-shedding frequency
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页数：16
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