Flow-induced vibration in in-line direction of a circular cylinder in a flow (1st report, measurement of added fluid forces in in-line direction acting on a circular cylinder in a flow)

Takashi Nishihara, Shigehiko Kaneko, Ryoichi Yasukawa, Tatsuo Watanabe

Research output: Contribution to journalArticle


Precise fluid force measurement by water tunnel test was conducted to investigate the mechanism of flow-induced vibration of a circular cylinder in in-line direction. Added fluid forces acting on a circular cylinder were measured by forced oscillation tests. As a result, it was confirmed that negative damping force acts on a cylinder in a certain range of reduced flow velocity corresponding to the first in-line oscillation region. The measured added damping force was then reduced to exciting parameter, which denotes nondimensional exciting fluid force. The characteristics of exciting parameter and the effect of mass ratio to the stability criteria were discussed in detail.

Original languageEnglish
Pages (from-to)2605-2613
Number of pages9
JournalNippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Issue number9
Publication statusPublished - 2002 Sep 1



  • Added damping
  • Added mass
  • Circular cylinder
  • Exciting parameter
  • Flow-induced vibration
  • Fluid force
  • Forced vibration
  • In-line oscillation
  • Mass ratio
  • Vibration coupled with fluid motion

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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