A posteriori constitutive relation error for dynamic model updating

摘要

In this study, an updating method based on the concept of the error on the constitutive relation is presented. This concept has already been exploited in the field of a posteriori error estimation to qualify the quality of a Finite Element computation. This paper illustrates how the a posteriori error aspect of the method is used to update dynamic models. It enhances the capabilities of detecting the mis-modelled regions or the erroneous substructures. Examples dealing with lightly damped structures and structural joints, using noisy frequency response functions are presented.