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Updating acoustic models: a constitutive relation error approach

par Decouvreur, Vincent
Président du jury Warzée, Guy
Promoteur Bouillard, Philippe ;Ladevèze, Pierre
Publication Non publié, 2008-01-31

Thèse de doctorat

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Résumé :

In the global framework of improving vibro-acoustic numerical prediction quality together with the need to decrease the number of prototyping stages, this manuscript focuses on achieving greater accuracy for acoustic numerical simulations by making use of a parametric updating technique, which enables tuning the model parameters inside physically meaningful boundaries. The improved model is used for the next prototyping stages, allowing more accurate results within reduced simulation times. The updating technique is based on recent works dealing with the constitutive relation error method (CRE) applied to acoustics. The updating process focuses on improving the acoustic damping matrix related to the absorbing properties of the materials covering the borders of the acoustic domain.