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A Comprehensive Set of Procedures to Estimate the Probability of Extreme Vibration Levels Due to Mistuning

[+] Author Affiliations
Y.-J. Chan, D. J. Ewins

Imperial College London, London, UK

Paper No. GT2009-59088, pp. 211-219; 9 pages
doi:10.1115/GT2009-59088
From:
  • ASME Turbo Expo 2009: Power for Land, Sea, and Air
  • Volume 6: Structures and Dynamics, Parts A and B
  • Orlando, Florida, USA, June 8–12, 2009
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4887-6 | eISBN: 978-0-7918-3849-5
  • Copyright © 2009 by ASME

abstract

A set of new procedures is developed to find the probabilities of extremely high amplification factors in mistuned bladed disk vibration levels, which rarely occur. While a rough estimate can be made by curve-fitting the distribution function, the method presented here can determine an accurate upper bound and the probabilities of amplification factors near to that bound. Two examples are provided to illustrate the efficiency of the method, which can be 2 or 3 orders of magnitudes more efficient than Monte Carlo simulations.

Copyright © 2009 by ASME

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