Non-parametric modelling of vibroacoustic coupling interface uncertainties

J.-F. Durand (1, 2) , L. Gagliardini (2) , Christian Soize (1)

1 LaM - Laboratoire de Mécanique
2 PSA Peugeot Citroen

In order to improve the numerical prediction robustness of the vehicle models, one introduces a model of random uncertainties with the non-parametric approach. Such an approach takes into account data errors as well as model errors. This paper deals with classical low frequency vibroacoustic modelling such as used for booming noise prediction. We are especially interested in vibroacoustic coupling uncertainties which are relevant to model errors. Introducing two different fluid-structure interface meshes, two estimations of acoustic energy are computed. Applying random uncertainties on the coupling interface, the results show that the non-parametric approach of vibroacoustic coupling uncertainties is able to model this class of uncertainties.

Mots clés: uncertainty quantification; vibroacoustics; medium frequency; structural acoustics; automotive vehicle; nonparametric probabilistic method; structural dynamics; random vibration; model uncertainties; modeling errors

Domaines: Vibrations [physics.class-ph]; Vibrations [physics.class-ph]; Acoustique [physics.class-ph]; Acoustique [physics.class-ph]; Statistiques [math.ST]; Théorie [stat.TH]; Probabilités [math.PR]

J.-F. Durand, L. Gagliardini, Christian Soize. Non-parametric modelling of vibroacoustic coupling interface uncertainties. 6th International Conference on Structural Dynamics, Université de Marne-la-Vallée, Sep 2005, Paris, France. pp.1193-1198. ⟨hal-00686192⟩