Reference : Nonlinear modal analysis and energy localization in a bladed disk assembly

	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Mechanical engineering Engineering, computing & technology : Computer science Physical, chemical, mathematical & earth Sciences : Mathematics Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/2268/18258

Title :	Nonlinear modal analysis and energy localization in a bladed disk assembly
Language :	English
Author, co-author :	Georgiades, Fotios [Université de Liège - ULg > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux > > >]
	Peeters, Maxime [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures >]
	Kerschen, Gaëtan [Université de Liège - ULg > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux >]
	Golinval, Jean-Claude [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures >]
	Ruzzenne, Massimo [Georgia Institute of Technology Atlanta, Georgia > School of Aerospace Engineering > > >]
Publication date :	Jun-2008
Main document title :	ASME Turbo Expo 2008: Power for Land, Sea and Air, Berlin, 2008
Audience :	International
Event name :	ASME Turbo Expo 2008: Power for Land, Sea and Air
Event date :	June 9-13, 2008
Event organizer :	ASME Gas Turbine Technical Congress and Exposition
Event place (city) :	Berlin
Event country :	Germany
Keywords :	[en] NONLINEAR MODAL ANALYSIS ; ENERGY LOCALIZATION ; BLADED DISK ASSEMBLY
Abstract :	[en] The objective of this study is to carry out modal analysis of nonlinear periodic structures using nonlinear normal modes (NNMs). The NNMs are computed numerically with a method developed in [18] that is using a combination of two techniques: a shooting procedureand a method for the continuation of periodic motion. The proposed methodology is applied to a simplified model of a perfectly cyclic bladed disk assembly with 30 sectors. The analysis shows that the considered model structure features NNMs characterized by strong energy localization in a few sectors. This feature has no linear counterpart, and its occurrence is associated with the frequencyenergy dependence of nonlinear oscillations.
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/18258

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