China Ocean Engineering

, Volume 33, Issue 1, pp 44–56 | Cite as

Vortex-Induced Vibrations of A Long Flexible Cylinder in Linear and Exponential Shear Flows

  • Yun GaoEmail author
  • Bin Yang
  • Li Zou
  • Zhi Zong
  • Zhuang-zhuang Zhang


A numerical study based on a wake oscillator model was conducted to determine the response performance of vortex-induced vibration (VIV) on a long flexible cylinder with pinned-pinned boundary conditions subjected to linear and exponential shear flows. The coupling equations of a structural vibration model and wake oscillator model were solved using a standard central finite difference method of the second order. The VIV response characteristics including the structural displacement, structural frequency, structural wavenumber, standing wave behavior, travelling wave behavior, structural velocity, lift force coefficient and transferred energy from the fluid to the structure with different flow profiles were compared. The numerical results show that the VIV displacement is a combination of standing waves and travelling waves. For linear shear flow, standing waves and travelling waves dominate the VIV response within the low-velocity and high-velocity zones, respectively. The negative values of the transferred energy only occur within the low-velocity zone. However, for exponential shear flow, travelling waves dominate the VIV response and the negative energy occurs along the entire length of the cylinder.

Key words

vortex-induced vibration long flexible cylinder wake oscillator model exponential shear flow transferred energy 


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Copyright information

© Chinese Ocean Engineering Society and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Yun Gao
    • 1
    Email author
  • Bin Yang
    • 1
  • Li Zou
    • 2
    • 3
  • Zhi Zong
    • 2
  • Zhuang-zhuang Zhang
    • 1
  1. 1.State Key Laboratory of Oil and Gas Reservoir Geology and ExplorationSouthwest Petroleum UniversityChengduChina
  2. 2.School of Naval ArchitectureDalian University of TechnologyDalianChina
  3. 3.Collaborative Innovation Center for Advanced Ship and Deep-Sea ExplorationShanghaiChina

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