Design method of new type sound barrier for wheel-rail noise control of high-speed train

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (23) : 231-239.

ZHANG Xiao’an1,SONG Gao1,CAO Xingxiao1,ZHU Shengyang2,YANG Jianjin2,ZHANG Xiaoyun1

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Abstract

China's rail transit infrastructure has been rapid development. With the implementation of the new version of the "Law of the People's Republic of China on Prevention and Control of Noise Pollution, the pollution prevention and control of the acoustic environment along the rail transit will become one of the key issues in the later stage. Therefore, it is necessary to improve the sound insulation performance requirements of the sound barrier of the important noise reduction equipment of rail transit.This paper proposes three new two-dimensional gas-solid phonon crystal type energy band structure design schemes for rail transit wheel track noise based on the Bragg band gap mechanism, analyzes the band gap characteristics of the three design schemes, and describes the sound insulation effect of the three design schemes through the sound transmission loss.The results show that the band structure arrangement designed in this paper based on phononic crystal theory can effectively block wheel-rail noise in a specific frequency band. By designing the arrangement and geometric parameters of scatterers reasonably, effective sound insulation can be further achieved in specific multi-frequency bands. Therefore, applying the proposed scheme to the sound barrier design can effectively improve the sound insulation performance of the sound barrier.

Key words

Rail transit / Sound barrier / Phononic crystal / Sound insulation performance / Band gap characteristics

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ZHANG Xiao’an1,SONG Gao1,CAO Xingxiao1,ZHU Shengyang2,YANG Jianjin2,ZHANG Xiaoyun1. Design method of new type sound barrier for wheel-rail noise control of high-speed train[J]. Journal of Vibration and Shock, 2023, 42(23): 231-239

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