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Multiharmonic analysis of nonlinear whole engine dynamics with bladed disc-casing rubbing contacts
A method has been developed for frequency domain analysis of steady state forced response in gas turbine engines in the presence of rubbing and snubbing contacts between bladed discs and casing and between other rotor and stator engine components. The multiharmonic contact interface elements have been derived for modelling the nonlinear contact interactions: (i) at bearings and (ii) bladed disc-casing rubbing contacts with using flexible models for rotor and stator structures. The elements allow for the asymmetry of the casing, the discrete blade contacts with casing, individual blade-casing gap values, nonlinear dependency of the contact forces on rotor-stator incursion and friction forces, intermittent contacts between blades and the casing. High accuracy and computational efficiency of the methods and models developed has been demonstrated on a set of test cases and on an example of analysis of a realistic gas turbine structure. Copyright 2012 by ASME.
History
Publication status
- Published
Publisher
American Society of Mechanical Engineers (ASME)External DOI
Page range
1181-1191Event name
ASME Turbo Expo 2012: Turbine Technical Conference and Exposition, GT 2012, June 11, 2012 - June 15, 2012Event location
Copenhagen, DenmarkBook title
ASME Turbo Expo 2012: Turbine Technical Conference and Exposition, Volume 7: Structures and Dynamics, Parts A and B, Copenhagen, Denmark, June 11–15, 2012Series
Proceedings of the ASME Turbo ExpoDepartment affiliated with
- Engineering and Design Publications
Notes
Paper No. GT2012-68474Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2015-05-04Usage metrics
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