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Vibro-acoustic FEA Modeling of Two Layer Trim Systems
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 16, 2005 by SAE International in United States
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This paper investigates the potential of using FEA poro-elastic Biot elements for the modeling carpet-like trim systems in a simplified setup. A comparison between FEA computations and experiments is presented for two layer (mass-spring) trim systems placed on a test-rig consisting in a 510×354×1.6 mm flat steel plate clamped in a stiff frame excited at its base. Results are presented for a given heavy layer with two different poro-elastic materials: one foam and one fibrous material. The investigations included accelerometer measurements on the steel plate, laser-doppler vibrometer scans of the heavy layer surface, sound pressure measurements in free field at a distance of 1 meter above the plate, as well as sound pressure in a closed rectangular concrete-walled cavity (0.5×0.6×0.7 m) put on top of the test-rig. Computations were carried out using a commercial FEA software implementing the Biot theory for poro-elastic media. Experiments and simulations are in good agreement both qualitatively and quantitatively up to 1 kHz.
CitationGlandier, C., Lehmann, R., Yamamoto, T., and Kamada, Y., "Vibro-acoustic FEA Modeling of Two Layer Trim Systems," SAE Technical Paper 2005-01-2325, 2005, https://doi.org/10.4271/2005-01-2325.
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