重载铁路轨道不平顺谱构建与分析

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Abstract Research purposes: In order to master the characteristics of track irregularity of heavy haul railways, data preprocessing and digital characteristics analysis were carried out based on measured data of track irregularity on heavy haul railways. The different types of irregularity spectrum of heavy haul railways were estimated by Welch method. A uniform fitting model was proposed to characterize the spectrum characteristics of track irregularity, Levenberg-Marquart algorithm was used to fit track vertical profile, alignment, cross-level and gauge irregularity spectrums of heavy haul railway, and the average spectral fitting parameters were obtained. The fitting spectrums of track irregularities of heavy haul railway were compared with those of existing track irregularity spectrum.
Research conclusions: (1) The track irregularity data of heavy haul railway has a stationary characteristic and basically obeys normal distribution. (2) The track geometry state of heavy haul railways analyzed is generally good, and the periodic wavelength components of different track irregularity spectrum are different, but all contain periodic wavelength components of 1.90 m and 1.15 m. (3) The track vertical profile, alignment and cross-level irregularity spectrums fitted are roughly the same as German low interference spectrum, while the gauge irregularity spectrum is generally worse than German high interference spectrum. (4) The research results can provide theoretical reference for the wheel-rail dynamic simulation analysis and maintenance management of heavy haul railways in China.

Key words： heavy haul railway track irregularity power spectral density non-linear fitting

Received: 25 June 2021

PACS:

U211

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	GAO Jianmin
	LAI Sicheng

Cite this article:

GAO Jianmin,LAI Sicheng. Construction and Analysis of Track Irregularity Spectrum of Heavy Haul Railway[J]. Journal of Railway Engineering Society, 2022, 39(3): 32-39.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I3/32

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