列车交会时高架轨道箱梁结构振动特性分析

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摘要 研究目的:针对列车交会运行时高架轨道箱梁结构的振动问题,基于车桥耦合动力学理论,建立多种列车交会工况下的车桥耦合联合仿真模型,从时域和频域的角度分析列车交会运行时箱梁结构振动传递规律,以期为高架轨道箱梁结构振动噪声控制提供理论依据。
研究结论:(1)列车双线等速交会时,箱梁结构跨中截面的位移响应大于列车双线不等速交会时的位移响应,其中在箱梁顶板和底板位置,等速交会时的振动位移响应约为列车单向运行时的2倍,不等速交会时的振动位移响应约为列车单向运行时的1.66~1.72倍;(2)列车双线等速交会与单向运行时的箱梁局部振动频率基本相同,但等速交会时的加速度响应幅值约为单向运行时的2倍;(3)列车通过时,翼缘板处振动位移最大,腹板次之,底板最小;(4)本研究成果可为高架轨道箱梁结构减振设计提供理论依据。

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	罗锟
	姜兴
	董玉英

关键词 ：城市轨道交通, 箱梁结构, 车桥耦合, 结构振动

Abstract：Research purposes: Aiming at the vibration problem of box girder structure in the elevated rail during train rendezvous, based on the vehicle-bridge coupling dynamics theory, a co-simulation model of vehicle-bridge coupling under various train rendezvous conditions is established, and the vibration transmission law of the box girder structure during train rendezvous is analyzed from the perspective of time domain and frequency domain, in order to provide a theoretical basis for the vibration and noise control of the elevated rail box girder structure.
Research conclusions:(1) In the double-line constant speed intersection, the displacement response of the span of the box girder structure is greater than that of the train double-line unequal speed intersection, in which the vibration displacement response during the constant speed intersection is about twice that of the one-way operation at the top and bottom plate of the box girder, and the vibration displacement response during the unequal speed intersection is about 1.66~1.72 times that of the one-way operation. (2) The local vibration frequency of the box girder in the double-line constant speed intersection is basically the same as that in one-way operation, but the acceleration response amplitude during the constant speed intersection is about twice that of the one-way operation. (3) When the train passes, the vibration displacement at the flange plate is the largest, followed by the web, and the floor plate is the smallest. (4) The research results can provide a theoretical basis for the vibration damping design of the elevated rail box girder structure.

Key words： urban rail transit box girder structure vehicle-bridge coupling structural vibration

收稿日期: 2022-03-18

PACS:	U441
	U448.21+3

基金资助:国家自然科学基金项目(52178424,51868023);江西省自然科学重点基金项目(20224ACB204018);江西省科技专项(20223AEI91004)

作者简介: ** 罗锟,1978年出生,男,副教授,硕士生导师。

引用本文:

罗锟, 姜兴, 董玉英. 列车交会时高架轨道箱梁结构振动特性分析[J]. 铁道工程学报, 2023, 40(1): 28-33.
LUO Kun, JIANG Xing, DONG Yuying. Vibration Characteristics Analysis of Box Girder Structure of Elevated Track during Train Rendezvous. Journal of Railway Engineering Society, 2023, 40(1): 28-33.

链接本文:

https://tdgcxb.crec.cn/CN/ 或 https://tdgcxb.crec.cn/CN/Y2023/V40/I1/28

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