Simulation study on the vortex-induced vibration interference of two tandem flexible pipes

WANG Haojie1,CHEN Zhengshou1,BAO Jian1,DU Bingxin1,QU Shaojin2

Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (18) : 210-227.

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PDF(3141 KB)
Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (18) : 210-227.

Simulation study on the vortex-induced vibration interference of two tandem flexible pipes

  • WANG Haojie1,CHEN Zhengshou1,BAO Jian1,DU Bingxin1,QU Shaojin2
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Abstract

Vortex-induced vibration related to deep-sea flexible pipes is a hot issue in the field of ocean engineering, and the phenomena of vibration interference among multiple pipes are attracted much attention. In this paper, the simulation study about the influence of different shear flow velocities and axial spacings on the interference of the vortex-induced vibration of the tandem flexible dual pipes in the case of low Reynolds number, was carried out via CFD package. The calculation results show that the axial spacing affects the motion responses of upstream and downstream pipes differently, in the form of having slight influence on the dominant vibration mode of the upstream pipe and having larger influence on the dominant vibration mode of the downstream pipe, respectively. Through the frequency domain analysis, it is found that the phenomenon of “multi-frequency coexistence” is favorable in the vibration processes related to upstream and downstream pipes in the case of various axial spacings. Through the transient time-domain analysis, it is found that the phenomena of “in-phase” and “anti-phase” are popular along either upstream pipe or downstream pipe. The multi-modal vibration characteristics and the law of modal conversion among adjacent vibration modes, as well as the characteristics of traveling waves and standing waves propagating along the slender flexible pipes are interpreted.
Key words: Vortex-induced vibration; tandem; axis spacing; vibration interference

Key words

Vortex-induced vibration / tandem / axis spacing / vibration interference

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WANG Haojie1,CHEN Zhengshou1,BAO Jian1,DU Bingxin1,QU Shaojin2. Simulation study on the vortex-induced vibration interference of two tandem flexible pipes[J]. Journal of Vibration and Shock, 2022, 41(18): 210-227

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