Mi. Friswell et al., Finite-element model updating using experimental test data: parametrization and regularization, PHI T ROY A, 359(1778), 2001, pp. 169-186
Citations number
15
Categorie Soggetti
Multidisciplinary
Journal title
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
Two critical issues in model updating are deciding how a finite-element mod
el should be parametrized and estimating the unknown parameters from the re
sulting ill-conditioned equations. A lack of understanding of these issues
will lead to updated models without physical meaning. This paper outlines t
he authors' approach to parametrization, using physical, geometric and gene
ric element parameters. It also applies useful methods of regularization, n
amely parameter constraints, the singular-value decomposition, L-curves and
cross-validation to model updating.