Interior Noise Contribution Analysis and BEV Sound Package Development 2019-01-1505
Due to the energy crisis and environmental pollution, many countries have released policies to promote the development and sales of new energy vehicles. New energy vehicles have become the focus of attention of various OEMs and component manufacturers. Sound package components have a great influence on the acoustic performance in the vehicle. Compared with traditional fuel vehicles, new energy vehicles have differences in body structure, parts layout, and noise sources. Furthermore, the sources of the noise inside the vehicle and the control measures will also change, so the sound packages should also be adjusted accordingly. In this paper, different types of vehicle SEA models were established based on real vehicles to analyze the interior acoustic performance. The contribution analysis method was used to compare the contribution differences of the sound package subsystems between the traditional fuel vehicle and the new energy vehicle. At the same time, the contribution analysis can help identify dominant subsystems that have large impacts on interior acoustic performance. The method was applied to the optimization of the acoustic package of the new energy vehicle.