Building Optimal Vibro-Acoustics Models From Measured Responses

The determination of an optimal model to represent as best as possible the behaviour of a structure, presented in this paper, is based on a set of candidate models whose parameters are set by fitting theoretical dispersion curves to experimental ones. The optimum model has not only to ensure a good fitting but also to be robust. Information theory give tools to select this optimum model. More precisely, Akaike criterion is used to select the optimal model, different cases have been studied but in the paper only the example of a sandwich panel is shown.