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Nonlinear modal analysis and energy localization in a bladed disk assembly
Georgiades, Fotios; Peeters, Maxime; Kerschen, Gaëtan et al.
2008In ASME Turbo Expo 2008: Power for Land, Sea and Air, Berlin, 2008
Peer reviewed
 

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Keywords :
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.
Disciplines :
Physics
Mechanical engineering
Computer science
Mathematics
Author, co-author :
Georgiades, Fotios;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Peeters, Maxime ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures
Kerschen, Gaëtan  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Golinval, Jean-Claude  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures
Ruzzenne, Massimo;  Georgia Institute of Technology Atlanta, Georgia > School of Aerospace Engineering
Language :
English
Title :
Nonlinear modal analysis and energy localization in a bladed disk assembly
Publication date :
June 2008
Event name :
ASME Turbo Expo 2008: Power for Land, Sea and Air
Event organizer :
ASME Gas Turbine Technical Congress and Exposition
Event place :
Berlin, Germany
Event date :
June 9-13, 2008
Audience :
International
Main work title :
ASME Turbo Expo 2008: Power for Land, Sea and Air, Berlin, 2008
Peer reviewed :
Peer reviewed
Available on ORBi :
since 10 August 2009

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