Minimizing vehicle noise and weight using panel acoustic contribution analysis

Gordon M. Brown

doi:10.1117/1.601660

1 May 1998 Minimizing vehicle noise and weight using panel acoustic contribution analysis

Gordon M. Brown

Optical Engineering, Vol. 37, Issue 5, (May 1998). https://doi.org/10.1117/1.601660

Panel acoustic contribution analysis (PACA) is an advanced engineering tool to improve noise, vibration, and harshness quality and minimize weight of vehicles. it is a technique to categorize areas of vehicle body panels as positive (sound level increases as vibration amplitude increases), negative or neutral according to their contribution to the total sound. PACA is a hybrid of computer aided engineering and experimental methods. Computer aided holometry (CAH), scanning laser ve- locimetry (SLV), or an accelerometer net is used to experimentally measure structure vibration complex velocities. These velocities are the boundary conditions for a boundary element model of the acoustic cavity. Boundary element analysis is then used to predict the vehicle interior sound and calculate panel acoustic contributions. Experimental results for a welded steel box (validation) and vehicle application are presented.

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Gordon M. Brown "Minimizing vehicle noise and weight using panel acoustic contribution analysis," Optical Engineering 37(5), (1 May 1998). https://doi.org/10.1117/1.601660

Published: 1 May 1998

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