Finite Element Model Updating using Experimental Test Data: Parameterization and Regularization

MI Friswell (University of Wales Swansea), JE Mottershead (Liverpool University) & H Ahmadian (Iran University of Science and Technology)

Transactions of the Royal Society of London, Series A, Special Issue on Experimental Modal Analysis, Vol. 359, No. 1778, January 2001, pp. 169-186

Abstract

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.

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Link to paper using doi:10.1098/rsta.2000.0719

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