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Thermal Effects on Internal and External Resonances of a Nonlinear Timoshenko Beam

[+] Author Affiliations
Anna Warminska, Jerzy Warminski

Lublin University of Technology, Lublin, Poland

Emil Manoach

Bulgarian Academy of Sciences, Sofia, Bulgaria

Paper No. DETC2014-34078, pp. V008T11A038; 7 pages
doi:10.1115/DETC2014-34078
From:
  • ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 8: 26th Conference on Mechanical Vibration and Noise
  • Buffalo, New York, USA, August 17–20, 2014
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-4641-4
  • Copyright © 2014 by ASME

abstract

Large amplitude vibrations of a Timoshenko beam under an influence of thermal and mechanical loadings are studied in the paper. The structural parameters of the beam are considered enabling internal resonance conditions. Moreover, it is assumed that the beam gets instantly temperature which is distributed along its length and thickness. The mathematical model represented by a set of partial differential equations takes into account coupled mechanical and thermal fields. The problem is transformed to a set of ODEs by the Galerkin method and three modes of a simply supported beam at both ends are studied. The effect of temperature on internal and external resonances is analysed on the basis of the proposed reduced model.

Copyright © 2014 by ASME

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