Flow-induced vibration of curved cylinder arrays subject to loose support

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• 作者：Min Tang (1) (2)
  Qiao Ni (1) (2)
  Yangyang Luo (1) (2)
  Yikun Wang (1) (2)
  Lin Wang (1) (2)
  
• 关键词：Curved tube ; Cross ; flow ; Fluidelastic instability ; Loose support
• 刊名：Nonlinear Dynamics
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：78
• 期：4
• 页码：2533-2545
• 全文大小：586 KB
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• 作者单位：Min Tang (1) (2)
  Qiao Ni (1) (2)
  Yangyang Luo (1) (2)
  Yikun Wang (1) (2)
  Lin Wang (1) (2)
  
  1. Department of Mechanics, Huazhong University of Science and Technology, Wuhan, 430074, China
  2. Hubei Key Laboratory for Engineering Structural Analysis and Safety Assessment, Wuhan, 430074, China
  
• ISSN：1573-269X

文摘

In this paper, an improved model is developed aimed at analyzing the fluidelastic vibration of a single flexible curved tube which is surrounded by rigid cylinders and subjected to cross-flow and loose support. Based on the previous model, the axial extension of the curved tube described by von Karman nonlinearity has been accounted for in the current research. Simulations are performed to explore the effect of quasi-steady fluid force model and velocity-limited friction model on the post-instability behavior. Numerical results show that the out-of-plane response is confined to a limit cycle by the von Karman nonlinearity and the in-plane vibration is induced by the out-of-plane vibration through the nonlinear coupling. When the loose support comes into play, the nonlinear impact forces become dominate. The results are presented; comparisons are made to analyze the parameters influencing the fretting-wear damage, such as normal work rate, contact ratio and impact force level.