Complex dynamics of a nonlinear aerospace structure: experimental identification and modal interactions

Noël, Jean-Philippe; Renson, Ludovic; Kerschen, Gaëtan

doi:10.1016/j.jsv.2014.01.024

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Article (Scientific journals)

Complex dynamics of a nonlinear aerospace structure: experimental identification and modal interactions

Noël, Jean-Philippe; Renson, Ludovic; Kerschen, Gaëtan

2014 • In Journal of Sound and Vibration, 333, p. 2588-2607

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https://hdl.handle.net/2268/162024

DOI
10.1016/j.jsv.2014.01.024

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Keywords :

Nonlinear system identification; aerospace structure; experimental data; nonlinear modal interaction

Abstract :

[en] Nonlinear system identification is a challenging task in view of the complexity and wide variety of nonlinear phenomena. The present paper addresses the identification of a real-life aerospace structure possessing a strongly nonlinear component with multiple mechanical stops. The complete identification procedure, from nonlinearity detection and characterization to parameter estimation, is carried out based upon experimental data. The combined use of various analysis techniques, such as the wavelet transform and the restoring force surface method, brings different perspectives to the dynamics. Specifically, the structure is shown to exhibit particularly interesting nonlinear behaviors, including jumps, modal interactions, force relaxation and chattering during impacts on the mechanical stops.

Disciplines :

Aerospace & aeronautics engineering

Author, co-author :

Noël, Jean-Philippe ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux

Renson, Ludovic ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux

Kerschen, Gaëtan ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux

Language :

English

Title :

Complex dynamics of a nonlinear aerospace structure: experimental identification and modal interactions

Publication date :

June 2014

Journal title :

Journal of Sound and Vibration

ISSN :

0022-460X

eISSN :

1095-8568

Publisher :

Academic Press, London, United Kingdom

Volume :

333

Pages :

2588-2607

Peer reviewed :

Peer Reviewed verified by ORBi

Funders :

FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture

Available on ORBi :

since 24 January 2014

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