SmEdA Vibro-Acoustic Modeling of a Trimmed Truck Cab in the Mid-Frequency Range

Abstract : The City Lightweight and Innovative Cab (CLIC) project was a scientific collaboration gathering public and private organizations. The aim was to propose an innovative lighten truck cab, where a high strength steel was used. As long as it could affect directly the acoustic environment of the cab, it was necessary to be able to simulate the vibroacoustic behavior of the truck cab in the mid frequency range. The dissipative treatments used for noise and vibration control such as viscoelastic patches and acoustic absorbing materials must then be taken into account in the problem. A process based on the SmEdA (Statistical modal Energy distribution Analysis) method was developed and is presented in this paper. SmEdA allows us substructuring the global problem, to study the interaction between the floor and the interior cavity. The process consists in building finite element models (FEM) of each subsystem (floor, internal cavity), including the dissipative material (damping layer, poroelastic material). Standard modal FEM calculations are then performed for each uncoupled subsystem. From the spatial mode shapes, and the modal strain -kinetic energies, the modal loss factors of both subsystems are estimated. Finally, the pressure levels inside the cavity are deduced from the resolution of the SmEdA equations. To validate this process, a truck cabin has been excited mechanically on a rail of the floor and the pressure levels at different positions inside the cabin were measured for different configurations of dissipative treatment. Comparisons between SmEdA and experimental results allows us to assess the accuracy of the proposed method.
Type de document :
Communication dans un congrès
10th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference, Jun 2018, Graz, Austria. SAE Technical Paper, pp.2018-01-1506, 2018, 〈https://www.sae.org/publications/technical-papers/content/2018-01-1506〉. 〈10.4271/2018-01-1506〉
Liste complète des métadonnées

Littérature citée [10 références]  Voir  Masquer  Télécharger

https://hal.archives-ouvertes.fr/hal-01829435
Contributeur : Kerem Ege <>
Soumis le : mercredi 18 juillet 2018 - 21:40:02
Dernière modification le : vendredi 26 octobre 2018 - 10:26:33
Document(s) archivé(s) le : lundi 1 octobre 2018 - 12:06:08

Fichier

Maxit_etal_ISNVH2018_HAL.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

Citation

Laurent Maxit, Jean-Louis Guyader, Kerem Ege, Youssef Gerges, Ha Dong Hwang, et al.. SmEdA Vibro-Acoustic Modeling of a Trimmed Truck Cab in the Mid-Frequency Range. 10th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference, Jun 2018, Graz, Austria. SAE Technical Paper, pp.2018-01-1506, 2018, 〈https://www.sae.org/publications/technical-papers/content/2018-01-1506〉. 〈10.4271/2018-01-1506〉. 〈hal-01829435〉

Partager

Métriques

Consultations de la notice

62

Téléchargements de fichiers

31