The Mechanism of the Noise Transmission in the Carbody of High-Speed Trains

Abstract:

To get the noise transmission mechanism in the carbody is the precondition for noise control. In order to study the noise transmission mechanism in the carbody of the high-speed trains, the relationship of the sound pressure level (SPL) and the vibration level (VL) was analyzed base on plane sound wave, and then a special test bench in laboratory was built to evaluate the relationship. Concentrated force load and sound load wre used in the experiment. First, the “SPL-VL” formulas in every one-third octaves were found under force load. Then the sound load test was used to evaluate the formulas. The result indicates that the noise radiated by the structure bending vibration accounts for a large proportion of interior noise in the special multilayer thin-wall carbody of high-speed trains. Damping treatment is used for further instructions.

• Periodical: Applied Mechanics and Materials (Volume 724)
• Pages: 250-255
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.724.250
• Online since: January 2015
• Authors: Jian Qiang Guo*, Jian Min Ge, Zhao Jin Sun, Xiao Jun Deng, Shao Qing Liu, Yan Ju Zhao
• Keywords: Bending Vibration, High-Speed Trains, Noise Transmission Mechanism, SPL-VL Laws

References

[1] Arthur W. Leissa. Vibration of Plates[M]. Washington, D. C:U.S. Government Printing Office, (1969).

[2] Frank Fahy, Paolo Gardnio. Sound and Structural Vibration(Second edition) [M]. UK: Academic Press in an imprint of Elsevier, (2007).

[3] ISO 1683: 2008. Acoustics-Preferred reference values for acoustical and vibratory levels.

[4] ISO 3381: 2005. Railway application-Acoustics-Measurement of noise inside railbound vehicle.

[5] Du Gonghuan. Zhu Zhemin. Gong Xiufen. Acoustics foundation(Second edition)[M]. Nanjing. Nanjing University Press, (2001).