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Self-Excited Oscillations in a Fluid-Beam Collapsible Channel

[+] Author Affiliations
Z. X. Cai

TianJin University, P.R. China

X. Y. Luo

University of Sheffield, Sheffield, UK

Paper No. IMECE2002-39025, pp. 1243-1249; 7 pages
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • 5th International Symposium on Fluid Structure Interaction, Aeroelasticity, and Flow Induced Vibration and Noise
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Applied Mechanics Division
  • ISBN: 0-7918-3659-2 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME


Unsteady behaviour of a new fluid-beam model for flow in collapsible channels is studied in this paper. A finite element code is developed to solve the fully fluid-structure interaction unsteady problem with method of rotating spines. The self-excited oscillations for different parameters are calculated and compared with these of the earlier fluid-membrane model by Luo & Pedley (1996). A stability line in the tension – wall stiffness space is identified which seems to associate with the small amplitude oscillations which are found only in the new model. As tension is reduced from the stability line, the oscillations undergo a change in amplitude and through to period doubling, highly irregular oscillations with chaotic-like behaviour, and finally divergent. The transition of these different types of oscillations, however, depends on the value of the wall stiffness which is new in this model.

Copyright © 2002 by ASME



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