线下式桥建合一车站振动噪声特性及控制研究

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Abstract Research purposes: In order to understand the formation mechanism, transmission path and distribution characteristics of vehicle-induced vibration and noise in the under-line station, a 'train-track-structure-soil' coupling dynamic model was established to study the vehicle-induced vibration of the station caused by the train passing through the station. The acoustic finite element method was used to calculate the secondary structure noise, and the statistical energy analysis was used to calculate the environmental noise in the station hall. The low vibration noise design of the under-line bridge-construction integration station was carried out according to the research results.
Research conclusions: (1) Compared with the bridge-construction separation station, the vibration level of the waiting hall of the bridge-construction integration station increases by 30 dB above 30 Hz, while the difference of vibration level is only 3.5 dB in the low frequency range below 30 Hz, which is more sensitive to human body. (2) Due to the hard connection between the bearing layer and the surrounding structure, the vibration of the bearing layer of the bridge-construction integrated station is smaller. The secondary structural noise is 5.5 dBA lower than that of the bridge-construction separated station, and the environmental noise is 1.4 dBA lower than that of the bridge-construction separated station. In general, it has better acoustic and vibration comfort for passengers. (3) The use of heavy damping track can effectively suppress the vibration of the station building. The vertical vibration acceleration of the floor is reduced by more than 10 times, and the noise reduction of the secondary structure can reach more than 25 dBA. The sound absorption and insulation measures in the platform layer and the hall layer can reduce the environmental noise in the waiting hall by more than 15 dBA. (4) The relevant vibration and noise control schemes can provide reference for the vibration and noise reduction design of integrated transportation hubs.

Key words： bridge-construction integration under-line station vehicle-induced vibration secondary structure noise environmental noise

Received: 03 September 2021

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TU112

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	Articles by authors
	LIU Jiahai
	HU Yongli
	LIU Fangbo
	YANG Jizhong

Cite this article:

LIU Jiahai,HU Yongli,LIU Fangbo, et al. Research on the Vibration and Noise Characteristics and Control of the Under-line Bridge-construction Integration Station[J]. Journal of Railway Engineering Society, 2022, 39(7): 102-108.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I7/102

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