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Simulation of Noise Reduction in Passenger Trains Using Metal Foams
Technical Paper
2011-01-1637
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
One of important problems in railway transportation systems is control of noise and vibration. Metal foams are very good medias for absorbing noise. So in this paper, noise of motion of a train is simulated by MATLAB software and the reduction of noise level in a compartment of passenger car that is equipped by metal foam sheets is considered. Commonly, the sound absorption coefficients are obtained experimentally and they are available in datasheets and references.
The different parameters that influence on the capability of this equipment were considered. For example the microstructure, thickness, magnitude of compaction, relative density and etc of metal foam is effective parameters. High porosity has good effect on the performance of absorber sheet. By increasing of compaction ratio, in frequency domain we will have enhancing of absorption of the noise. Compaction process is done by two different ways: one is direct and else is progressively. Relative density has inverse relation with reduction of sound pressure level. So with these considerations the absorption ability of metal foams is less than glass wool as one of the best available noise absorbers in industry. But by changing the microstructure such as rolling, compaction and derailment and also increasing area of used metal foam, we can achieve to high level performances.
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Citation
Khezerloo, A., owhadi Esfahani PhD, A., and Jalily lng, S., "Simulation of Noise Reduction in Passenger Trains Using Metal Foams," SAE Technical Paper 2011-01-1637, 2011, https://doi.org/10.4271/2011-01-1637.Also In
References
- Hess, T. J. Lu Audrey Ashby, M. F. “Sound absorption in metallic foams” journal of applied physics. American Institute of Physics. 7528 7539 1999
- Ashby, M.F Evans, A.G Fleck, N.A. Gibson, L.J. Hutchinson, J.W. Wadley, H.N.G. “Metal Foams: A Design Guide” Butterworth-Heinemann Boston 2000
- Haijun, Yu. Guangchun, Ya. Xiaolin, Wang. Yihan, Liu. Hongbin, Li. “Sound insulation property of Al-Si closed-cell aluminium foam sandwich panels” Applied Acoustics 68 China 1502 1510 2007
- Banhart, John “Aluminium foams for lighter vehicles” Int. J. Vehicle Design 37 2/3 Germany 114 125 2005
- Ashby, M. F. Hutchinson, J. W. Evans, A. G. Cellular “Metals, A Design Guide” Cambridge University Press Cambridge, UK 1998
- Jiejun, Wu Chenggong, Li Dianbin, Wang Manchang, Gui “Damping and sound absorption properties of particle reinforce Al matrix composite foams” Composites Science and Technology 63 569 574 2003
- Koch, A. Thompson, M. Nardone, V. Proceedings 4th International Conference on Aluminum Alloys Atlanta, GA 387 1994
- Gibson, L. J. Ashby, M. F. “Cellular Solids” 2nd Cambridge, UK 1997
- Shinko Wire Co. “Alporas Data Sheets” Amagasaki-shi, Japan 1997
- Hong, Zhou Bo, Li Guangsu, Huang Jia, He “A novel composite sound absorber with recycled rubber particles” Journal of Sound and Vibration 304 400 40 2007