Finite Element Model Updating Using Bayesian Approach

Marwala, Tshilidzi; Mdlazi, Lungile; Sibisi, Sibusiso

Finite Element Model Updating Using Bayesian Approach

Authors

Marwala, Tshilidzi

Mdlazi, Lungile

Sibisi, Sibusiso

Description

This paper compares the Maximum-likelihood method and Bayesian method for finite element model updating. The Maximum-likelihood method was implemented using genetic algorithm while the Bayesian method was implemented using the Markov Chain Monte Carlo. These methods were tested on a simple beam and an unsymmetrical H-shaped structure. The results show that the Bayesian method gave updated finite element models that predicted more accurate modal properties than the updated finite element models obtained through the use of the Maximum-likelihood method. Furthermore, both these methods were found to require the same levels of computational loads.
7 pages, IMAC2004