Structural Engineering and Mechanics

  • 제75권5호
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  • Pages.621-631
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  • 2020
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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Vortex-induced vibration characteristics of a low-mass-ratio flexible cylinder

  • Quen, Lee Kee (Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia) ;
  • Abu, Aminudin (Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia) ;
  • Kato, Naomi (Department of Naval Architecture and Ocean Engineering, Graduate School of Engineering, Osaka University) ;
  • Muhamad, Pauziah (Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia) ;
  • Siang, Kang Hooi (School of Mechanical Engineering, Universiti Teknologi Malaysia) ;
  • Hee, Lim Meng (Institute of Noise and Vibration, Universiti Teknologi Malaysia) ;
  • Rahman, Mohd Asamudin A (School of Ocean Engineering, Universiti Malaysia Terengganu)
  • 투고 : 2019.07.24
  • 심사 : 2020.04.03
  • 발행 : 2020.09.10
⟨ 이전 논문 다음 논문 ⟩

초록

A laboratory experiment is conducted is to investigate the behaviour of a low-mass-ratio and high aspect ratio flexible cylinder under vortex-induced vibration (VIV). A flexible cylinder with aspect ratio of 100 and mass ratio of 1.17 is towed horizontally to generate uniform flow profile. The range of Reynolds number is from 1380 to 13800. Vibration amplitude, in-line and cross-flow frequency response, amplitude trajectory, mean tension variation and hydrodynamic force coefficients are analyzed based on the measurement from strain gauges, load cell and CCD camera. Experimental results indicate that broad-banded lock-in region is found for the cylinder with a small Strouhal number. The frequency switches in the present study indicates the change of the VIV phenomenon. The hydrodynamic force responses provide more understanding on the VIV of a low mass ratio cylinder.

키워드

과제정보

This research was financially supported by Japan International Cooperation Agency under grant (S.K130000.0543.4Y191) and Universiti Teknologi Malaysia research grant (R.K130000.7343.4B362)

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