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

Bladed disk; Dovetail attachments; Dynamical behaviours; Dynamical simulation; Eigen-solutions; External excitation; Forced response; Frequency domain formulation; Friction contact interfaces; Friction interfaces; Modal damping; Modal parameters; Non-linear; Nonlinearities; Ring dampers; Stability analysis; Engineering (all)

Abstract :

[en] 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. Copyright © 2008 by ASME.

Disciplines :

Aerospace & aeronautics engineering

Author, co-author :

Laxalde, Denis; École Centrale de Lyon, Laboratoire de Tribologie et Dynamique des Systemes, 69134 Ecully Cedex, France ; Snecma - Safran group, 77550 Moissy-Cramayel, France

Salles, Loïc ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M) ; École Centrale de Lyon, Laboratoire de Tribologie et Dynamique des Systemes, 69134 Ecully Cedex, France ; Snecma - Safran group, 77550 Moissy-Cramayel, France

Blanc, Laurent; École Centrale de Lyon, Laboratoire de Tribologie et Dynamique des Systemes, 69134 Ecully Cedex, France

Thouverez, Fabrice; École Centrale de Lyon, Laboratoire de Tribologie et Dynamique des Systemes, 69134 Ecully Cedex, France

Language :

English

Title :

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

Publication date :

December 2008

Event name :

Volume 5: Structures and Dynamics, Parts A and B

Event organizer :

ASME

Event place :

Berlin, Germany

Event date :

09-06-2008 => 13-06-2008

Audience :

International

Main work title :

2008 Proceedings of the ASME Turbo Expo: Power for Land, Sea, and Air

Publisher :

ASMEDC

ISBN/EAN :

978-0-7918-4315-4

Peer review/Selection committee :

Peer reviewed

Additional URL :

http://asmedigitalcollection.asme.org/GT/proceedings-pdf/doi/10.1115/GT2008-50860/2688034/457_1.pdf

Funders :

IGTI - International Gas Turbine Institute

Available on ORBi :

since 04 July 2025

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Bibliography

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