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Numerical Simulation of the Vibro-Acoustic Behavior of a Vehicle under Operating Conditions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published November 04, 2014 by SAE International in United States
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Currently the numerical simulations of the vibro-acoustic behavior of vehicles are built considering only major structures, such as its basic structure (body in white), doors, dashboard etc. To take into account the contribution of other components (such as trims, seats, sound insulation etc.) to the overall response of the model, the average characteristics of these materials are inserted globally in this model. However, for more correlated models is necessary to consider local characteristics of these components.
This work presents the numerical procedure for simulating the effect of the structural damping of viscoelastic coatings and the acoustic absorption of the trims such that its effects can be considered in the model of the full vehicle.
The operating forces applied to the model were estimated from the laboratory and road tests using the SPC/TPA technique. Furthermore, the model enables the subjective evaluation of the noise from the auralization/synthesis based on numerical frequency response functions and road test data.