A Fast Method to Obtain the Nonlinear Response of Multi-Mode Rotors Supported on Squeeze Film Dampers Using Planar Modes: Part II — Parametric Studies PUBLIC ACCESS

[+] Author Affiliations
R. Y. Yakoub, A. El-Shafei

Cairo University, Giza, Egypt

Paper No. 98-GT-413, pp. V005T14A040; 9 pages
  • ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education
  • Stockholm, Sweden, June 2–5, 1998
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7866-8
  • Copyright © 1998 by ASME


This paper is a continuation of Part I, where the advantages of the fast algorithm to obtain the nonlinear response of multi-mode rotors supported on Squeeze Film Dampers (SFDs) are exploited. In Part I, the fast algorithm which relies on planar modal analysis and circular orbits to obtain a polynomial in rotor speed, is described. The advantages of the algorithm showing twenty five orders of magnitude computer time savings are discussed. In this paper, the fast algorithm is used to perform parametric studies on an aircraft gas turbine fan rotor (AGTFR). The parametric studies show the possibility of appropriately locating the SFD, to dampen the rotor modes. In addition, parametric studies are also used to determine the effect of the SFD parameters on the AGTFR unbalance response.

Copyright © 1998 by ASME
Topics: Dampers , Rotors
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