Application of the Boundary Element Method to Elastodynamic Inverse Problems : Consideration on Noisy Additional Information

Abstract

The inverse problem under consideration deals with the identification of unknown defects in structural components by using the elastodynamic boundary element method and the optimization technique. In the inverse problem, identification results are greatly influenced by the errors included in additional information. This study is concerned with a numerical experiment to investigate the influence of measurement errors in the given additional information on the identification results. Numerical simulation is carried out for two-dimensional example problems when the displacement responses given as additional information include probabilistic errors with the normal distribution. In addition, a practical method is proposed for improvement of accuracy in identification.