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IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century


IASS Symposium 2016

SESSION: New Approaches, Materials & Construction Methods

Numerical Study of Vortex Induced Vibration of a Cylinder with Span-wise Waviness

< Table of Contents for New Approaches, Materials & Construction Methods
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: New Approaches, Materials & Construction Methods
  • Pages: 7
  • Title: Numerical Study of Vortex Induced Vibration of a Cylinder with Span-wise Waviness
  • Author(s): Kai Zhang, Dai Zhou, Hiroshi Katsuchi, Hitoshi Yamada
  • Keywords: vortex induced vibration, wavy cylinder, Karman vortices, aerodynamic forces
Abstract
The current paper aims at clarifying whether the circular cylinder with span-wise waviness, which has been proven to be effective in mitigating the aerodynamic forces, could suppress the vortex induced vibrations. The numerical results show that with zero or small structural damping, the response of the wavy cylinder is almost the same with the normal cylinder, i.e., large amplitude vibrations occur, together with frequency coalesce and amplification of the aerodynamic forces. However, as the structural damping increases to a threshold value, this particular geometry outperforms the normal cylinder. The current paper provides some guidelines for the potential use of the wavy cylinder in spatial structures as a low drag, low VIV-response device.

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