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A Reduced Order Model for Transient Analysis of Bladed Disk Forced Response

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

Carnegie Mellon University, Pittsburgh, PA

Paper No. GT2005-68128, pp. 381-390; 10 pages
doi:10.1115/GT2005-68128
From:
  • ASME Turbo Expo 2005: Power for Land, Sea, and Air
  • Volume 4: Turbo Expo 2005
  • Reno, Nevada, USA, June 6–9, 2005
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4727-6 | eISBN: 0-7918-3754-8
  • Copyright © 2005 by ASME

abstract

A method for predicting the vibratory response of bladed disks under high engine acceleration rates is developed. The method is based on the Fundamental Mistuning Model, an existing reduced order model for predicting the steady-state vibratory response. In addition, a criterion is developed for a critical engine acceleration rate, above which transient effects play a large role in the response. It is shown that military engines operate at acceleration rates above this critical value and therefore transient effects are important in practice.

Copyright © 2005 by ASME

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