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Application of Dry-Friction Whip and Whirl Solution Methods to Systems With Support Asymmetry

[+] Author Affiliations
Jason C. Wilkes

Southwest Research Institute, San Antonio, TX

Paper No. GT2018-76991, pp. V07BT34A041; 8 pages
  • ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition
  • Volume 7B: Structures and Dynamics
  • Oslo, Norway, June 11–15, 2018
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5114-2
  • Copyright © 2018 by ASME


Dry-friction whip and whirl occurs when a rotor contacts a stator across a clearance annulus. In a general sense, the relative motion between the two bodies is described by a circular precessing motion. While this problem is generally well understood, the author is unaware of any papers that discuss the problem for systems having asymmetric rotor or stator supports. The current work will investigate a general model to describe dry-friction whip and whirl for the case of continuous contact between a rotor and stator in the presence of asymmetry. This paper will show that for light asymmetry, the rotor and stator motions are elliptical; however, the relative motion between the two bodies remains circular.

Copyright © 2018 by ASME



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