ORBi: Lenaerts V. - Proper orthogonal decomposition for model updating of non-linear mechanical systems

Reference : Proper orthogonal decomposition for model updating of non-linear mechanical systems


	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Electrical & electronics engineering Engineering, computing & technology : Mechanical engineering Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/2268/18348

Title :	Proper orthogonal decomposition for model updating of non-linear mechanical systems
Language :	English
Author, co-author :	Lenaerts, V. [ > > ]
	Kerschen, Gaëtan [Université de Liège - ULg > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux >]
	Golinval, Jean-Claude [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures >]
Publication date :	2001
Journal title :	Mechanical Systems & Signal Processing
Publisher :	Academic Press
Volume :	15(1)
Pages :	31-43
Audience :	International
ISSN :	0888-3270
City :	London
Country :	United Kingdom
Keywords :	[en] Vibrations ; Nonlinear ; Dynamics
	[fr] Aerospace ; Structures
Abstract :	[en] Proper orthogonal decomposition (POD), also known as Karhunen}Loeve (K}L) decomposition, is emerging as a useful experimental tool in dynamics and vibrations. The POD is a means of extracting spatial information from a set of time-series data available on a domain. The use of (K}L) transform is of great help in non-linear settings where traditional linear techniques such as modal-testing and power-spectrum analyses cannot be applied. These decomposition can be used as an orthogonal basis for e$cient representation of the ensemble. The POM have been interpreted mainly as empirical system modes and the application of POD to measured displacements of a discrete structure with a known mass matrix leads to an estimation of the normal modes. We investigate the use of the proper orthogonal modes of displacements for the identi"cation of parameters of non-linear dynamical structures with an optimisation procedure based on the di!erence between the experimental and simulated POM. A numerical example of a beam with a local non-linear component will illustrate the method. (C) 2001 Academic Press
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/18348
DOI :	10.1006/mssp.2000.1350,
Other URL :	http://www.idealibrary.com on

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