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A Fundamental Model of Mistuning for a Single Family of Modes

[+] Author Affiliations
D. M. Feiner, J. H. Griffin

Carnegie Mellon University, Pittsburgh, PA

Paper No. GT2002-30425, pp. 953-964; 12 pages
doi:10.1115/GT2002-30425
From:
  • ASME Turbo Expo 2002: Power for Land, Sea, and Air
  • Volume 4: Turbo Expo 2002, Parts A and B
  • Amsterdam, The Netherlands, June 3–6, 2002
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-3609-6 | eISBN: 0-7918-3601-0
  • Copyright © 2002 by ASME

abstract

A new reduced order model of mistuned bladed disk vibration is presented. This new approach is shown to accurately represent the response of real turbine geometries when only a single family of modes is excited. Yet its mathematical form is even simpler than that of a mass-spring model. Because it requires only minimal input data, this model is much easier to use than previous reduced order methods. Furthermore, its simplicity allows the fundamental parameters that control mistuning to be readily identified.

Copyright © 2002 by ASME

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