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Added Mass Variation and Van der Pol Models Applied to Vortex-Induced Vibrations

[+] Author Affiliations
André L. C. Fujarra, Celso P. Pesce

University of São Paulo, São Paulo, Brazil

Paper No. IMECE2002-32162, pp. 207-211; 5 pages
doi:10.1115/IMECE2002-32162
From:
  • 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

abstract

Vortex Induced Vibrations (VIV) experiments in water, conducted with flexible or elastically mounted rigid cylinders, under low values of mass-damping parameter, often reveal a large lock-in range, presenting a flat response region just after the amplitude curve peak. Previous phenomenological models, which treat the vortex wake dynamics with nonlinear oscillators of the Van der Pol type, are unable to predict this flat response region. The present paper re-addresses the phenomenological approach and shows that a consistent interpretation of a relevant hydrodynamic parameter, written as functions of reduced velocity, namely the added-mass, plays an essential role in improving analytical results.

Copyright © 2002 by ASME

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