Booming noise analysis of passenger car using integrated approach of CAT/CAE 2000-05-0293
The need of lightweight vehicle design is motivated by the
recent global trend of less fuel consumption and lower emission in
vehicle. However in NVH development of vehicle, it becomes more
difficult for the lightweight vehicle to reach low vibro-acoustic
sensitivity than, for the heavy weight one to do so.
Inthis environment, this paper describes about the practical
finite element (FE) modeling of vehicle structure and acoustics, in
order to predict "boom" response to powertrain
excitation. The FE modeling process through validation and updating
with experimental mode makes, the accumulation of considerable
expertise for improving prediction accuracy, possible. FE analysis
based on this modeling process is so useful for predicting
"boom" levels up to 200 Hz. Using the result of FE
analysis, structural optimization is executed in order to improve
"boom" level of 80 Hz.