Abstract
Keywords: Interior Trim, Sound Absorption Coefficient, Transmission Loss, Statistical Energy Analysis, Sound Package, Design Optimization
Optimizing acoustic performance of a vehicle at the component or system levels is always a challenge to NVH Engineers. This paper is to develop a full vehicle statistical energy analysis (SEA) model for acoustic package application and optimize vehicle noise and vibration performance over cost and weight. Simplification and remodeling process of a vehicle SEA model was achieved from importing Solidworks CAD model into the AutoSEA2 software. A procedure of the model development in AutoSEA2 was described to remodel the vehicle using plate functions. The cavity and excitation were then applied to the model. Finally vehicle components in the model were assigned by the correct materials. After the AutoSEA2 model was established, Taguchi method has been introduced to find which trim parts of the vehicle will have the largest influences on the sound pressure levels inside the passenger compartment.