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Multiharmonic analysis of nonlinear whole engine dynamics with bladed disc-casing rubbing contacts

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posted on 2023-06-08, 20:41 authored by Yevgen PetrovYevgen Petrov
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)

Page range

1181-1191

Event name

ASME Turbo Expo 2012: Turbine Technical Conference and Exposition, GT 2012, June 11, 2012 - June 15, 2012

Event location

Copenhagen, Denmark

Book title

ASME Turbo Expo 2012: Turbine Technical Conference and Exposition, Volume 7: Structures and Dynamics, Parts A and B, Copenhagen, Denmark, June 11–15, 2012

Series

Proceedings of the ASME Turbo Expo

Department affiliated with

  • Engineering and Design Publications

Notes

Paper No. GT2012-68474

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2015-05-04

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