A Study on the Vortex-Induced Vibration Mechanism of Cantilever Cylinders Under Gas-Liquid Cross Flows

YAN Hao; DAI Huliang; WANG Lin; NI Qiao

doi:10.21656/1000-0887.430065

Volume 43 Issue 5

May 2022

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YAN Hao, DAI Huliang, WANG Lin, NI Qiao. A Study on the Vortex-Induced Vibration Mechanism of Cantilever Cylinders Under Gas-Liquid Cross Flows[J]. Applied Mathematics and Mechanics, 2022, 43(5): 577-585. doi: 10.21656/1000-0887.430065

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A Study on the Vortex-Induced Vibration Mechanism of Cantilever Cylinders Under Gas-Liquid Cross Flows

doi: 10.21656/1000-0887.430065

YAN Hao^{1, 2
,},
DAI Huliang^{1, 2
,
,},
WANG Lin^{1, 2},
NI Qiao^{1, 2}

1.
Department of Engineering Mechanics, School of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan 430074, P.R.China
2.
Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment, Wuhan 430074, P.R.China

Received Date: 2022-03-02
Rev Recd Date: 2022-03-29

Available Online: 2022-04-12

Publish Date: 2022-05-15

Abstract

Abstract

Aimed at vortex-induced vibration (VIV) of the submarine reconnaissance telescope lifting above the water surface, a theoretical model for VIV of a cantilever cylinder under the actions of two different cross flows, i.e. gas and liquid, was established. The effects of parameters such as the distribution ratio and the density ratio for these two fluids on VIV responses of the cylinder were studied. Based on the Galerkin technique and the Runge-Kutta algorithm, numerical results of the cylinder vibration responses were obtained. The results show that, the increase of the distribution ratio can widen the lock-in range of the cylinder. The peak amplitude of the cylinder increases first and then decreases with the distribution ratio. The amplitude reaches the maximum value with a distribution ratio of 0.5, and this maximum value will increase with the decrease of the density ratio. In addition, single-period and multi-period motions will occur with the change of the fluid distribution ratio. The present research provides a theoretical guidance for the design and analysis of the submarine reconnaissance telescope.
- vortex-induced vibration,
- cantilever cylinder,
- lock-in,
- cross flow

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References(18)

References

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