Reference : Experimental nonlinear identification of an aircraft with bolted connections
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Aerospace & aeronautics engineering
http://hdl.handle.net/2268/173585
Experimental nonlinear identification of an aircraft with bolted connections
English
De Filippis, Giovanni [Politecnico di Bari > > > >]
Noël, Jean-Philippe mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux >]
Kerschen, Gaëtan [Université de Liège - ULg > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux >]
Soria, Leonardo [Politecnico di Bari > > > >]
Stephan, Cyrille [ONERA > > > >]
Jan-2016
Proceedings of the International Modal Analysis Conference (IMAC) XXXIII
No
No
International
International Modal Analysis Conference (IMAC) XXXIII
du 2 février au 5 février 2015
Society for Experimental Mechanics (SEM)
Orlando
FL
[en] Nonlinear system identification ; frequency-domain subspace method ; full-scale aircraft ; cubic splines ; spurious poles
[en] Aircraft structures are known to be prone to nonlinear phenomena, especially as they constantly become lighter and hence more flexible. One specific challenge that is regularly encountered is the modeling of the mounting interfaces between aircraft subcomponents. Indeed, for large amplitudes of vibration, such interfaces may loosen and, in turn, trigger complex mechanisms such as friction and clearances. In this context, the present work intends to investigate the nonlinear dynamics of the Morane–Saulnier Paris aircraft, accessible at ONERA. This aircraft possesses multiple bolted connections between two external fuel tanks and wing tips. The objective of the paper is specifically to carry out an adequate identification of the numerous nonlinearities affecting the dynamics of this full-scale structure. Nonlinearity detection and the subsequent subspace-based parameter estimation have been performed on experimental data, collected during an on-ground test campaign. Nonlinearity detection is first achieved by the comparison of frequency response functions estimated at low excitation level, with those obtained at high amplitude level, yielding insight towards accurately characterizing the behavior of the bolted connections. Then, a nonlinear subspace identification method is applied to measured data to estimate the linear and nonlinear parameters of the structure and novel strategies and tools that overcome specific arisen problems are developed.
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/173585
10.1007/978-3-319-15221-9_24

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