Flow-induced vibration in in-line direction of a circular cylinder in a flow (2nd report, nonlinear characteristics of added fluid forces in in-line direction acting on a circular cylinder in a flow)

Takashi Nishihara, Shigehiko Kaneko, Ryoichi Yasukawa, Tatsuo Watanabe

研究成果: Article査読

抄録

Precise measurements of added fluid forces acting on a circular cylinder in in-line direction were conducted with some different forcing amplitude conditions in a water tunnel to investigate their nonlinear characteristics. In the previous report, characteristics of added fluid forces were reported in the case that fording amplitude is 5%. In this report, the experimental results in the case that forcing amplitude is 2.5% and 10% are described and compared with those of 5% amplitude condition. As a result, it was found that added damping forces are strongly dependent on cylinder amplitude, while added mass coefficient is insensitive to it. The measured added damping force was reduced to exciting parameter, which denotes dimensionless exciting fluid force. The characteristics of the exciting parameter agree quantitatively with the in line oscillation behavior of an elastically supported cylinder in a cross flow obtained by previous free oscillation tests. Furthermore, the effects of fluid damping to the exciting parameter were discussed on the basis of the experimental results in detail.

本文言語English
ページ(範囲)2880-2888
ページ数9
ジャーナルNippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
68
10
DOI
出版ステータスPublished - 2002 10
外部発表はい

ASJC Scopus subject areas

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

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