Two critical issues in model updating are deciding how a finite element model should be parameterised and estimating the unknown parameters from the resulting ill-conditioned equations. A lack of understanding of these issues will lead to updated models without physical meaning. This paper outlines the authors' approach to parameterisation, using physical, geometric and generic element parameters. It also applies useful methods of regularisation, namely parameter constraints, the singular value decomposition, 'L' curves and cross validation to model updating.
|Translated title of the contribution||Finite-element model updating using experimental test data: parametrization and regularization|
|Pages (from-to)||169 - 186|
|Number of pages||18|
|Journal||Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences|
|Publication status||Published - Jan 2001|