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From Exterior Wind Noise Loads to Interior Cabin Noise: A Validation Study of a Generic Automotive Vehicle
ISSN: 1946-3995, e-ISSN: 1946-4002
Published June 15, 2015 by SAE International in United States
Citation: Neuhierl, B., Senthooran, S., Toppinga, R., Jäger, A. et al., "From Exterior Wind Noise Loads to Interior Cabin Noise: A Validation Study of a Generic Automotive Vehicle," SAE Int. J. Passeng. Cars - Mech. Syst. 8(3):1075-1081, 2015, https://doi.org/10.4271/2015-01-2328.
The object of the validation study presented in this paper is a generic vehicle, the so-called SAE body, developed by a consortium of German car manufacturers (Audi, Daimler, Porsche, Volkswagen). Many experiments have been performed by the abovementioned consortium on this object in the past to investigate its behavior when exposed to fluid flow. Some of these experiments were used to validate the simulation results discussed in the present paper.
It is demonstrated that the simulation of the exterior flow is able to represent the transient hydrodynamic structures and at the same time both the generation of the acoustic sources and the propagation of the acoustic waves. Performing wave number filtering allows to identify the acoustic phenomena and separate them from the hydrodynamic effects.
In a next step, the noise transferred to the interior of the cabin through the glass panel was calculated, using a Statistical Energy Analysis approach. It is shown that the simulated results correspond well with experiments.