Article (Scientific journals)
Identification of nonlinear normal modes of engineering structures under broadband forcing
Noël, Jean-Philippe; Renson, Ludovic; Grappasonni, Chiara et al.
2016In Mechanical Systems and Signal Processing
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Keywords :
Nonlinear normal modes; Experimental data; Broadband excitation; Nonlinear system identification; Numerical continuation
Abstract :
[en] The objective of the present paper is to develop a two-step methodology integrating system identification and numerical continuation for the experimental extraction of nonlinear normal modes (NNMs) under broadband forcing. The first step processes acquired input and output data to derive an experimental state-space model of the structure. The second step converts this state-space model into a model in modal space from which NNMs are computed using shooting and pseudo-arclength continuation. The method is demonstrated using noisy synthetic data simulated on a cantilever beam with a hardening-softening nonlinearity at its free end.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Noël, Jean-Philippe ;  Université de Liège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Renson, Ludovic ;  Université de Liège > R&D Direction : Chercheurs ULiège en mobilité
Grappasonni, Chiara ;  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 :
Identification of nonlinear normal modes of engineering structures under broadband forcing
Publication date :
2016
Journal title :
Mechanical Systems and Signal Processing
ISSN :
0888-3270
eISSN :
1096-1216
Publisher :
Academic Press, London, United Kingdom
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
UE - Union Européenne [BE]
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