A structural-acoustic finite element model of an automotive vehicle is developed and experimentally evaluated for predicting the structural-borne interior noise in the passenger compartment when the vehicle travels over a randomly rough road at a constant speed. The structural-acoustic model couples a structural finite element model of the vehicle with an acoustic finite element model of the passenger compartment. Measured random road profile data provides the prescribed power spectral density excitation applied at the tire-patch contact points to predict the structural-borne interior road noise. Comparisons of the predicted and measured interior noise for laboratory shaker excitation, tire patch excitation, and vehicle travel over a randomly rough road are used to assess the accuracy of the model.

Volume Subject Area:
Sound, Vibration and Design
Topics:
Acoustics, Automobiles, Finite element methods, Noise (Sound), Roads, Vehicles, Excitation, Finite element model, Surface roughness, Tires, Spectral energy distribution
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Copyright © 2009
 by General Motors
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