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Sensitivity analysis of multiharmonic self-excited limit-cycle vibrations in gas-turbine engine structures with nonlinear contact interfaces

posted on 2023-06-08, 20:41 authored by Yevgen PetrovYevgen Petrov
An efficient frequency-domain method is developed to calculate the sensitivity of multiharmonic amplitudes of the limit-cycle oscillations and their primary frequency to variation of the nonlinear contact interface parameters and aerodynamic characteristics. The method allows highly accurate and fast determination of the sensitivity coefficients together with the calculation of the limit-cycle amplitudes and frequencies using realistic large-scale finite element models of structures. The nonlinear contact interactions analysed include: friction contacts, unilateral interaction along normal direction at a contact interface, closing and opening clearances and interferences, cubic spring nonlinearity. The capabilities of the method are demonstrated on a set of test cases. Copyright 2014 by ASME.


Publication status

  • Published


American Society of Mechanical Engineers (ASME)

Event name

ASME Turbo Expo 2014: Turbine Technical Conference and Exposition, GT 2014, June 16, 2014 - June 20, 2014

Event location

Dusseldorf, Germany

Book title

ASME Turbo Expo 2014: Turbine Technical Conference and Exposition, Volume 7A: Structures and Dynamics Düsseldorf, Germany, June 16–20, 2014




Proceedings of the ASME Turbo Expo

Department affiliated with

  • Engineering and Design Publications


Paper No. GT2014-26673, pp. V07AT34A006; 11 pages

Full text available

  • No

Peer reviewed?

  • Yes

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