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Comparison of Several Error Metrics for FE Model Updating

Anders T Johansson (Institutionen för tillämpad mekanik, Dynamik) ; Thomas Abrahamsson (Institutionen för tillämpad mekanik, Dynamik) ; Fred van Keulen
Proceedings of the 25th International Modal Analysis Conference (IMAC-XXV), February 19-22, Orlando, Florida, USA, (2007)
[Konferensbidrag, övrigt]

The choice of error metric is one of the most crucial choices of model updating. Many articles have been published advocating the use of certain such metrics, as have comparative studies of various methods based on different error metrics. This article describes the differences between a number of error metrics and their corresponding objective functions using many different evaluation methods, such as plots of objective functions, Cramer-Rao lower bounds and condition numbers of the Hessian. This approach has the advantage that it gives the user a way of assessing error metrics in terms of solvability of the optimization problem and identifiability of parameters of the model updating problem.

Denna post skapades 2008-05-07. Senast ändrad 2008-09-08.
CPL Pubid: 70735


Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Dynamik


Teknisk mekanik

Chalmers infrastruktur

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