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Obtaining nonlinear frequency responses from broadband testing
Gourc, Etienne; Grappasonni, Chiara; Noël, Jean-Philippe et al.
2016In Proceedings of the International Modal Analysis Conference (IMAC) XXXIV
 

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Keywords :
subspace identification; continuation; harmonic balance; nonlinear; random excitation
Abstract :
[en] The objective of the paper is to obtain the frequency response curves of nonlinear mechanical systems from broadband testing. The proposed approach consists in coupling an identification method with a continuation method. Specifically, the frequency-domain nonlinear subspace identification (FNSI) method is first used to derive an experimental model of the structure in state space from broadband measurements. The harmonic balance method coupled with arclength continuation then utilizes this experimental model to compute the frequency response curves of the system. The method is demonstrated using a numerical example.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Gourc, Etienne ;  Université de Liège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Grappasonni, Chiara ;  Université de Liège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Noël, Jean-Philippe ;  Université de Liège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Detroux, Thibaut ;  Université de Liège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Kerschen, Gaëtan  ;  Université de Liège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Language :
English
Title :
Obtaining nonlinear frequency responses from broadband testing
Publication date :
January 2016
Event name :
SEM IMAC XXXIV A Conference and Exposition on Structural Dynamics
Event organizer :
Society for Experimental Mechanics
Event place :
Orlando, Florida, United States
Event date :
25 - 28 January 2016
Audience :
International
Main work title :
Proceedings of the International Modal Analysis Conference (IMAC) XXXIV
European Projects :
FP7 - 307265 - NOVIB - The Nonlinear Tuned Vibration Absorber
Funders :
UE - Union Européenne [BE]
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
CE - Commission Européenne [BE]
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