Transmission Characteristics and Optimization of Full Path Structure Acoustic of Pantograph Area

doi:10.3901/JME.2023.24.262

Abstract

Abstract: Aiming at the problem that the interior noise of pantograph area of high-speed train is obvious, and the sound transmission characteristics of pantograph roof area and its contribution to interior noise are insufficient. Based on the hybrid FE-SEA method, considering the whole sound transmission link of pantograph mounting base, body profile, interior hoisting / roof cavity, interior roof and interior noise, the sound transmission characteristics analysis model of composite roof structure is established. The characteristic of interior noise response and the sound transmission were studied and corresponding measures for noise control in the vehicle are proposed. The results show that, the vehicle body profile structure generates vibration and sound radiation under force excitation, which will contribute to the sound source of the train interior noise through the air and structural sound transmission path through the interior roof panel; The profile contributes about 78% of the noise power input in the train, and the interior roof panel contributes about 15%. The profile plays a leading role in the noise response of the train; By optimizing the vibration and sound radiation of the profile structure, and optimizing the vibration isolation of the “mounting base-profile-hoisting-interior roof” structural path, the vibration response of the body profile, hoisting structure and interior roof can be reduced by more than 4～5dB. The total value of the noise in the train is reduced by 2.4 dB(A). The contribution of pantograph roof components to vehicle interior noise is quantitatively analyzed. The research results can provide reference for vehicle interior noise control in pantograph area of high-speed trains.

Key words: vehicle engineering, high speed train, FE-SEA method, pantograph flat top, structural noise, in-vehicle noise

CLC Number:

TG156

LIU Fangbo, XIAO Xinbiao, ZHANG Jie, LI Ye. Transmission Characteristics and Optimization of Full Path Structure Acoustic of Pantograph Area[J]. Journal of Mechanical Engineering, 2023, 59(24): 262-270.

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