The heavier a vehicle, the more it pollutes. What if the choice of materials used for NVH comfort could be a game changer?
Work towards lighter vehicles to reduce the ecological impact
Today, the goal of manufacturers is no longer just to make vehicles quieter. They are also looking to technologically optimize other features such as their weight reduction to reduce environmental impact. Also, it is necessary to review the automotive design to maintain an excellent level of vibro-acoustic comfort while lightening the structure of the vehicle.
To this end, the CEVAA focused on the study and choice of materials used for NVH comfort. Indeed, heavy masses are present in the passenger compartment to reduce vibrations. The solution would lie in the covering foams initially used for noise absorption. It would thus be possible to optimize their use to dampen vibrations.
Reducing the materials by combining the use of trim foams for both acoustic comfort and vibration comfort would thus make it possible to lighten the vehicle.
Research project: thesis
This research project is part of a CIFRE thesis led by Meryem Le Deunf and supported by the ANRT. The thesis follows the project funded by CARNOT ESP. It is part of a partnership between CEVAA (center of expertise and testing in vibration, acoustics and reliability of the 6NAPSE Group) and the Acoustics laboratory of the University of Le Mans (LAUM).