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Reciprocal Measurements of the Vehicle Transfer Function for Road Noise
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 15, 2015 by SAE International in United States
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Road Noise is generated by the change of random displacement input inside the tire contact patch. Since the existing 3 or 6 directional electromagnetic shakers have a flat surface at the tire contact patch, these shakers cannot excite the vehicle in a manner representative of actual on-road road noise input. Therefore, this paper proposes a new experimental method to measure the road noise vehicle transfer function. This method is based on the reciprocity between the tire contact patch and the driver's ear location. The reaction force sensor of the tire contact patch is newly developed for the reciprocal loud speaker excitation at the passenger ear location. In addition, with this equipment, it is possible to extract the dominant structural mode shapes creating high sound pressure in the automotive interior acoustic field. This method is referred to as experimental structure mode participation to the noise of the acoustic field in the vibro-acoustic coupling analysis. This information is very important to improve FE model accuracy to represent the physical phenomenon. The validity of the presented method is confirmed by the effectiveness of the structural countermeasures acquired by analyzing the structural causes from the extracted modes.
CitationTsuji, H., Maruyama, S., and Onishi, K., "Reciprocal Measurements of the Vehicle Transfer Function for Road Noise," SAE Technical Paper 2015-01-2241, 2015, https://doi.org/10.4271/2015-01-2241.
- Tsuji, H., Maruyama, S., Yoshimura, T., and Takahashi, E., “Experimental Method Extracting Dominant Acoustic Mode Shapes for Automotive Interior Acoustic Field Coupled with the Body Structure,” SAE Int. J. Passeng. Cars - Mech. Syst. 6(2):1139-1146, 2013, doi:10.4271/2013-01-1905.
- Maruyama, S., Hasegawa, A., and Hyoudou, Y., “Interior Noise Analysis Based on Acoustic Excitation Tests at Low-Frequency Range,” SAE Technical Paper 1999-01-1806, 1999, doi:10.4271/1999-01-1806.
- Chargin Mladen, Gartmeier Otto, A Finite Element Procedure for Calculating Fluid-Structure Interaction Using MSC/NASTRAN, NASA Technical Memorandum 102857, Ames Research Center Moffett, 1990
- Tsuji, H., Enomoto, T., Maruyama, S., and Yoshimura, T., “A Study of Experimental Acoustic Modal Analysis of Automotive Interior Acoustic Field Coupled with the Body Structure,” SAE Technical Paper 2012-01-1187, 2012, doi:10.4271/2012-01-1187.
- Wyckaert Katrien, Augusztinovicz Fulop, Vibro-acoustical Modal Analysis : Reciprocity, Model Symmetry and Model Validatiy, ISMA19, p739-760 (1994)
- Sung, S., Nefske, D., Le-The, H., and Bonarens, F., “Development and Experimental Evaluation of a Vehicle Structural-Acoustic Trimmed-Body Model,” SAE Technical Paper 1999-01-1798, 1999, doi:10.4271/1999-01-1798.
- Tsuji H., Maruyama S., and et al., “Experimental acoustic modal analysis for automotive interior acoustic field coupling with body structure” JSAE Technical Paper No. 20105330, pp. 1-4 (2010) (in Japanese).
- Díaz C. González, Vercammen S., Middelberg J., Kindt P., Thiry C., Leyssens J.. “Numerical prediction of the dynamic behaviour of rolling tyres” ISMA2012_0891 (2012)
- Vercammen S., Díaz C. González, Kindt P., Middelberg J., Thiry C., Leyssens J.. “Experimental characterization of the dynamic behavior of rolling tires” ISMA2012_0890 (2012)