Reference : Proper orthogonal decomposition for model updating of non-linear mechanical systems
Scientific journals : Article
Engineering, computing & technology : Electrical & electronics engineering
Engineering, computing & technology : Mechanical engineering
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/18348
Proper orthogonal decomposition for model updating of non-linear mechanical systems
English
Lenaerts, V. [> >]
Kerschen, Gaëtan mailto [Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux >]
Golinval, Jean-Claude mailto [Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures >]
2001
Mechanical Systems and Signal Processing
Academic Press
15(1)
31-43
Yes (verified by ORBi)
International
0888-3270
1096-1216
London
United Kingdom
[en] Vibrations ; Nonlinear ; Dynamics
[fr] Aerospace ; Structures
[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
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/18348
10.1006/mssp.2000.1350
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