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FEM analysis of noise reduction in automobile suspension

Duprez, Guillaume
(2021)

Files

Duprez_31111500_2021.pdf
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Details

Supervisors
Delannay, Laurent
Faculty
Ecole polytechnique de Louvain
Degree label
Master [120] : ingénieur civil mécanicien, à finalité spécialisée
Abstract
Noise, vibration, and harshness (NVH) identifies noise as the principal cause of ride discomfort. Critical to NVH, suspension rubber bushings can also be a source of noise due to dry friction. This thesis addresses the influence of dry friction at the bushing level. This work proposes a static FEM model of a simplified bushing geometry, recreating its prevalent deformation mode. It was built with Abaqus/CAE (DassaultSystèmes, France). The third-order Ogden’s model was chosen to reproduce the rubber's hyperelasticity. Its parameters were calibrated to load-displacement curves using optimization methods. The analysis revealed that radial deformation’s level and surfaces’ geometrical features directly impact friction sensitivity. This suggests a deformation range where friction might generate noise and shows the importance of part design.