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Generic Friction Models for Time-Domain Vibration Analysis of Bladed Discs

[+] Author Affiliations
E. P. Petrov, D. J. Ewins

Imperial College London, London, UK

Paper No. GT2003-38475, pp. 223-233; 11 pages
doi:10.1115/GT2003-38475
From:
  • ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference
  • Volume 4: Turbo Expo 2003
  • Atlanta, Georgia, USA, June 16–19, 2003
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-3687-8 | eISBN: 0-7918-3671-1
  • Copyright © 2003 by ASME

abstract

New efficient models have been developed to describe dynamic friction effects in order to facilitate analysis of the vibration of bladed discs in the time domain. These friction models describe friction forces occurring at contact interfaces under time-varying normal load variations, including cases of separation. The friction models developed allow one to take into account time-varying friction contact parameters, such as friction coefficient and contact stiffness coefficients. Anisotropy and variation of the friction characteristics over the contact surfaces are included in the proposed models. The capabilities of the new friction models are demonstrated. Analysis of the friction forces is performed for different motion trajectories and different time variations of the normal load, and the effects of anisotropy, variation in time of the friction characteristics and normal load variation are discussed. A numerical analysis of transient vibrations of shrouded blades using the new models is presented.

Copyright © 2003 by ASME

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