城市轨道交通轨面短波不平顺特性分析

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摘要 研究目的：为深入分析城市轨道交通轨面短波不平顺特征,本文基于某城市时速120 km地铁线路实测数据,分析轨面短波不平顺波形特征及幅值分布规律,计算并分析轨面短波不平顺谱特征,提出城市轨道交通轨面短波不平顺谱拟合表达式。
研究结论：（1）焊缝接头区不平顺每隔25 m出现一次,其影响范围为焊缝处左右±1.5 m,波形主要以M型（低接头）为主;（2）小半径曲线区段的减振轨道均存在明显短波波磨波形,无长波波磨特征;（3）曲线区段内外轨短波谱均存在明显较大尖峰值,其大多是由钢轨波磨引起的,且内轨比外轨波磨严重;（4）提出的六阶多项式拟合函数,能更好地反映城市地铁线路轨面短波不平顺特征;（5）本研究结果可用于指导城市地铁车辆轨道动力学性能设计,也可为城市地铁线路轨道状态评估及养护维修管理提供理论依据。

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	沈龙江
	田春香
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	陈小芳
	徐金辉

关键词 ：城市轨道交通, 短波不平顺, 统计特性分析, 曲线拟合

Abstract：Research purposes: In order to deeply analyze the characteristics of rail surface short-wave irregularity in urban rail transit, this paper analyzes the waveform characteristics and amplitude distribution law of rail surface short-wave irregularity, calculates and analyzes the spectral characteristics of rail surface short-wave irregularity, and puts forward the fitting expression of rail surface short-wave irregularity spectrum in urban rail transit.
Research conclusions: (1) The irregularity of weld joint area occurs every 25 m, and its influence range is about ±1.5 m at the weld, and the waveform is mainly M-shaped (low joint). (2) The damping tracks in the small radius curve section all have obvious short-wave grinding waveforms, and have no long-wave grinding characteristics. (3) There are obvious sharp peaks in the short spectrum of the inner and outer rails in the curve section, which are mostly caused by rail corrugation, and the inner rail corrugation is more serious than the outer rail corrugation. (4) The proposed sixth-order polynomial fitting function can better reflect the short-wave irregularity characteristics of urban subway lines. (5) The results of this study can be used to guide the dynamic performance design of urban subway vehicles, and also provide theoretical basis for the state evaluation and maintenance management of urban subway lines.

Key words： urban rail transit short wave irregularity statistical characteristics analysis curve fitting

收稿日期: 2024-07-26

PACS:

U213.4+2

基金资助:国家自然科学基金项目（52268067）; 中国中车股份有限公司原创技术十年培育专项项目（2022CYY007）; 轨道交通基础设施性能监测与保障国家重点实验室自主课题（HJGZ2022206）

作者简介: ** 沈龙江,1979年出生,男,正高级工程师。

引用本文:

沈龙江, 田春香, 贺世忠, 陈小芳, 徐金辉. 城市轨道交通轨面短波不平顺特性分析[J]. 铁道工程学报, 2024, 41(10): 24-30.
SHEN Longjiang, TIAN Chunxiang, HE Shizhong, CHEN Xiaofang, XU Jinhui. Analysis of Short-wave Irregularity Characteristics of Urban Rail Transit Track Surface. Journal of Railway Engineering Society, 2024, 41(10): 24-30.

链接本文:

https://tdgcxb.crec.cn/CN/ 或 https://tdgcxb.crec.cn/CN/Y2024/V41/I10/24

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