Car Noise reduction using SEA
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.