城市轨道交通轨面短波不平顺特性分析

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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

Received: 26 July 2024

PACS:

U213.4+2

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	Articles by authors
	SHEN Longjiang
	TIAN Chunxiang
	HE Shizhong
	CHEN Xiaofang
	XU Jinhui

Cite this article:

SHEN Longjiang,TIAN Chunxiang,HE Shizhong, et al. Analysis of Short-wave Irregularity Characteristics of Urban Rail Transit Track Surface[J]. Journal of Railway Engineering Society, 2024, 41(10): 24-30.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2024/V41/I10/24

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