Non-linear modal analysis for bladed disks with friction contact interfaces

Denis Laxalde, Loïc Salles, Laurent Blanc, Fabrice Thouverez

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

37 Citations (Scopus)

Abstract

A method for non-linear modal analysis of mechanical systems with contact and friction interfaces is proposed. It is based on a frequency domain formulation of the dynamical system's equations of motion. The dissipative aspects of these non-linearities result in complex eigensolutions and the modal parameters (natural frequency and modal damping) can be obtained without any assumptions on the external excitation. The generality of this approach makes it possible to address any kind of periodic regimes, in free and forced response. In particular, stability analysis in flutter applications can be performed. Applications for the design of friction ring dampers for blisks and for the dynamical simulation of bladed disk with dovetail attachment are proposed. Finally, we propose a study of dynamical behaviour coupling with the calculation of fretting-wear at the interfaces based on non-linear modal characterization.

Original languageEnglish
Title of host publication2008 Proceedings of the ASME Turbo Expo
Subtitle of host publicationPower for Land, Sea, and Air
Pages457-467
Number of pages11
EditionPART A
DOIs
Publication statusPublished - 2008
Externally publishedYes
Event2008 ASME Turbo Expo - Berlin, Germany
Duration: 9 Jun 200813 Jun 2008

Publication series

NameProceedings of the ASME Turbo Expo
NumberPART A
Volume5

Conference

Conference2008 ASME Turbo Expo
Country/TerritoryGermany
CityBerlin
Period9/06/0813/06/08

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