Interior noise study of passenger room of high speed train under wheel-rail excitation

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Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (1) : 95-98.

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Interior noise study of passenger room of high speed train under wheel-rail excitation

Shi Yu1,Xiao Yougang2,Kang Zhicheng3

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Abstract

A series of models, namely the vehicle-track coupling dynamics model, the finite element model of train head, the acoustical boundary element model of passenger room of high speed train, have been established. The interior noises of passenger room caused by track irregularities have been calculated, and the distribution characters of the internal noise of passenger room have been ascertained and reached the following conclusion: The noise in passenger room changes in the range of 61.9～69.6 dBA. At the frequency of 40 Hz and 200 Hz, the sound pressure levels in passenger room are greater. To reduce the biggest noise in the passenger room, measure must be adopted at 40 Hz and 100 Hz, which are the decisive frequencies. At 40 Hz, it is better to add stiffened ribs or a layer of damping material on the panel with biggest acoustics contribution; At 200 Hz, it will more suitable to coat with viscoelastic layer on the panel with the biggest acoustical contribution.

Key words

high speed train / wheel-rail excitation / passenger room / acoustic respond

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Shi Yu;Xiao Yougang;Kang Zhicheng. Interior noise study of passenger room of high speed train under wheel-rail excitation[J]. Journal of Vibration and Shock, 2009, 28(1): 95-98