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Nonlinear Vibrations and Stability of Shells Conveying Water Flow

[+] Author Affiliations
Marco Amabili, Michael P. Païdoussis

McGill University, Montreal, QC, Canada

Kostas Karagiozis

École Polytechnique de Montréal, Montreal, QC, Canada

Paper No. DETC2009-86114, pp. 1343-1350; 8 pages
doi:10.1115/DETC2009-86114
From:
  • ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 1: 22nd Biennial Conference on Mechanical Vibration and Noise, Parts A and B
  • San Diego, California, USA, August 30–September 2, 2009
  • Conference Sponsors: Design Engineering Division and Computers in Engineering Division
  • ISBN: 978-0-7918-4898-2 | eISBN: 978-0-7918-3856-3
  • Copyright © 2009 by ASME

abstract

Shells containing flowing fluids are widely used in engineering applications, and they are subject to manifold excitations of different kinds, including flow excitations. The response of a shell conveying fluid to harmonic excitation, in the spectral neighbourhood of one of the lowest natural frequencies, is investigated for different flow velocities. The theoretical model has been developed using the Donnell theory retaining in-plane inertia. Linear potential flow theory is applied to describe the fluid-structure interaction, and the steady viscous effects are added to take into account flow viscosity. For different amplitudes and frequencies of the excitation and for different flow velocities, the following are investigated numerically: (i) periodic response of the system; (ii) unsteady and stochastic motion; (iii) loss of stability by jumps to bifurcated branches. The effect of the flow velocity on the nonlinear periodic response of the system has also been investigated. Bifurcation diagrams and Lyapunov exponents have been used to study the unsteady and stochastic dynamics of the system.

Copyright © 2009 by ASME

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