Panel contribution analysis of vehicle components using statistical energy analysis model

In this study, an A-segment hatchback vehicle was modeled using statistical energy analysis (SEA) and panel contribution analysis (PCA) was conducted under three driving conditions using the SEA model. For the dash and floor of the vehicle, the acoustic performance of each part can be estimated using the transfer matrix method, for different acoustical materials. For the remaining parts of the vehicle, the sound transmission loss and the sound absorption coefficient were measured in situ and applied to the vehicle SEA model. PCA was conducted using the windowing method, and the driving conditions of the vehicle are as follows: First, third-gear fixed wide open throttle (WOT) was measured on a proving ground, second, third-gear fixed WOT was measured on a chassis dynamometer installed in a semi-anechoic chamber, and finally, a random noise source was placed in the engine room to excite the system. The contribution analysis of the vehicle's dash panel, floor panel, roof, door, tailgate, and the rest of the parts was conducted under three conditions using the SEA model.