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Car Noise reduction using SEA


The goal of the project was to finalize a methodology of noise reduction possibilities by creating a specific materials data-base for SEA simulation, to be used to optimise weight of added trims during new car models development. Materials acoustic characteristics have been determined with SCS 902A materials suite and with direct measurements on car subsystem (trunk and passenger compartment) of specific characteristics, i.e. sound absorption and insulation.

The car subsystem is then analysed in terms of modal density, stiffness and damping, the latter was related to the real need of damping materials addition vs. efficiency in terms of noise reduction. Experimental data on body in white elements have been used to tune the SEA simulation model of the car, while further on, the materials data-base has been merged to the SEA model to obtain a "real" and validated development model for prototyping.
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