Amélioration de l'identification des paramètres de couplage et mécaniques des matériaux poreux par analyse de sensibilité

Porous materials are widely used in vibro-acoustics for many reasons. Modelling porous materials appears as an important challenge for optimal design. However the behaviour of these materials involves many mechanical and coupling modelling parameters. Their knowledge is fundamental for obtaining reliable models allowing efficient design procedure. This article presents a study conducted in order to improve their identification. The method associates a preliminary parameters sensitivity analysis with an optimisation study. The global sensitivity analysis of the outputs of interest is done using the FAST method. The sensitivity analysis is then used to optimize parameters by readjusting analytical results over experimental measurements. We also present the results and benefits of the methodology coupling parametric sensitivity analysis and optimal updating technique. Mots clefs : Parametres de couplage, materiaux poreux, melamine, FAST