Robustesse des modèles numériques du comportement vibroacoustique des véhicules vis-a-vis des incertitudes de modélisation

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

1 LaM - Laboratoire de Mécanique
2 PSA Peugeot Citroen

The design of cars is nowadays mainly based on numerical simulations. In oder to improve the robustness of numerical predictions, one introduces a probabilistic model of uncertainties. The uncertainty modelling is based on the use of a non-parametric approach. Application of this non-parametric approach to vehicle-uncertainties modelling shows the sensitivity of the vibroacoustic frequency responses to structural, cavity and vibroacoustic coupling uncertainties and, the sensitivity of the structural modes to structural uncertainties. Since a vehicle is a strongly heterogeneous medium, some parts are more sensitive to uncertainties than others.

Domaines: Vibrations [physics.class-ph]; Vibrations [physics.class-ph]; Acoustique [physics.class-ph]; Acoustique [physics.class-ph]; Probabilités [math.PR]

J.-F. Durand, L. Gagliardini, Christian Soize. Robustesse des modèles numériques du comportement vibroacoustique des véhicules vis-a-vis des incertitudes de modélisation. 17ème Congrès Français de Mécanique 2005, AFM, Aug 2005, Troyes, France. pp.Pages : 1-6. ⟨hal-00773340⟩