A Finite Element Model Updating Method Using Experimental Modal Parameters Applied On A Railway Bridge
Author(s)
A. Teughels, J. Maeck & G. De Roeck
Abstract
A finite element model updating method using
experimental modal parameters applied on a
railway bridge
A. Teughels, J. Maeck & G. De Roeck
Department of Civil Engineering, Katholieke Universiteit Leuven,
Belgium
Abstract
A finite element model updating method using experimental modal para-
meters is presented. Such a procedure can be regarded as an optimisation
problem. The objective function consists of the (weighted) sum of differ-
ences between the experimental modal data (eigenfrequencies and mode-
shapes) and the corresponding analytical predictions. The function can be
completed with additional orthogonality conditions. The updating para-
meters are the uncertainties of the model, which are changed locally until
the objective function is minimised. A gradient-based algorithm is used to
solve the optimisation problem. As a result a physically more correct model
is obtained on which further analysis can be made. The presented proce-
dure is applied on a railway bridge at An
Keywords
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