地铁车辆段减振道岔减振特性试验研究

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摘要 研究目的:地铁车辆段具有道岔和轨道接头多、曲线半径小、列车行车速度低等特点,其轨道结构的减振设计一般参照地铁正线,实际减振特性尚不明确。为掌握双层非线性扣件在车辆段内轨道道岔运用效果,对车辆段内减振道岔进行试验研究。
研究结论:(1)双层非线性减振扣件能够减小钢轨传至扣件减振层以下的道床和盖板地面处振动,但扣件减振层以上的钢轨处振动显著增大;车速20 km/h时,辙叉处道床和盖板地面分别衰减6.6 dB和4.1 dB,钢轨处增大8.6 dB;(2)采用双层非线性扣件后,钢轨振动在大部分频段范围都增大,其中在10~20 Hz最为显著;道床在60~400 Hz之间衰减比较明显;盖板地面处衰减主要在20~60 Hz之间,但在5 Hz和10 Hz附近出现一定的放大;(3)减振道岔处钢轨-道床传递损失明显大于普通道岔,振动从钢轨传至道床处时,在1 000 Hz范围内都发生了衰减,其中在20 Hz以内衰减最为显著,衰减量在35 dB以上;(4)本研究成果可应用于铁道工程减振设计领域。

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	林珊
	陈艳明
	冯青松

关键词 ：地铁车辆段, 双层非线性扣件, 减振道岔, 减振特性

Abstract：Research purposes: Metro depot has the characteristics of many turnouts and track joints, small curve radius and low train speed, and the vibration reduction design of the track structure generally refers to the main line of the subway, and the actual vibration reduction effect is not clear. In order to understand the vibration reduction effect of double-layer nonlinear fastener in turnout in metro depot, the experimental research of vibration reduction turnout in metro depot was carried out.
Research conclusions:(1) The double-layer nonlinear fastener can reduce the vibration of the track bed and platform below the fastener layer, but the vibration of the rail above the fastener layer increases significantly. When the train speed is 20 km/h, the track bed and platform ground at the frog attenuate by 6.6 dB and 4.1 dB respectively, and the rail increases by 8.6 dB. (2) After using double-layer nonlinear fastener, the rail vibration increases in most frequency bands, especially in 10~20 Hz; the attenuation of track bed is obvious in 60~400 Hz; the attenuation of platform ground is mainly in 20~60 Hz, and there is a certain amplification in 5 Hz and 10 Hz. (3) The rail-bed transfer loss at the vibration reducing turnout is significantly greater than that of the ordinary turnout. When the vibration is transmitted from the rail to the track bed, the attenuation occurs in the range of 1 000 Hz, in which the attenuation is significant within 20 Hz, and the attenuation is more than 35 dB. (4) The research results in this paper can be applied to the field of vibration reduction design of railway engineering.

Key words： metro depot double-layer nonlinear fastener vibration reducing turnout vibration reduction characteristics

收稿日期: 2021-08-11

PACS:

U211.3

基金资助:国家自然科学基金项目(52178423,52068029,51878277);江西省主要学科学术和技术带头人培养计划项目(20194BCJ22008);江西省重点研发计划项目(20192BBE50008)

作者简介: ** 林珊,1971年出生,女,正高级工程师。

引用本文:

林珊, 陈艳明, 冯青松. 地铁车辆段减振道岔减振特性试验研究[J]. 铁道工程学报, 2023, 40(1): 21-27.
LIN Shan, CHEN Yanming, FENG Qingsong. Experimental Research on the Vibration Reduction Characteristics of the Vibration Reduction Turnout in Metro Depot. Journal of Railway Engineering Society, 2023, 40(1): 21-27.

链接本文:

https://tdgcxb.crec.cn/CN/ 或 https://tdgcxb.crec.cn/CN/Y2023/V40/I1/21

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