Abstract
In this paper an attempt is made to identify cracks or defects by means of the optimization technique using the elastodynamic boundary element method. The inverse problem is cast into an optimum problem, in which the objective function is assumed as the square sum of residuals between the reference data measured at selected points on the boundary and the corresponding values computed by the BEM. Assuming that a crack or defect has simple geometry, the optimal set of only several parameters should be determined by the standard optimization technique to estimate the most plausible shape and location. Numerical experiment is carried out for two-dimensional problems to demonstrate the usefulness of the proposed identification procedure.
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