增强的垂直铁路轨道质量指数,具有移动列车的动态响应
Siwarak Unsiwilai1, Wassamon Phusakulkajorn1, Chen Shen1
1Section of Railway Engineering, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, 2628CN, the Netherlands.
Heliyon
|October 21, 2024
概括
一个新的增强的垂直轨道质量指数 (EnVTQI) 整合了轨道几何和列车动态. 这种改进的指数更好地识别了轨道问题,特别是在压载物和亚体结构中,提高了铁路维护决策.
科学领域:
- 铁路工程 铁路工程是指铁路工程.
- 地质技术工程 地质技术工程
- 振动分析 振动分析
背景情况:
- 传统的垂直轨道质量指数 (TQI) 在检测压载物和基板层中的问题方面存在局限性.
- 突然的轨道变化显著影响火车轨道相互作用,通常被标准的TQI遗漏.
- 轴箱加速 (ABA) 测量捕获动态响应,表明轨道状况的变化.
研究的目的:
- 通过将传统的TQI与ABA测量的动态响应相结合,提出一个增强的垂直轨道质量指数 (EnVTQI).
- 制定一个框架,用于识别不同层次的轨道状况,包括压载物和基架.
- 提高铁路轨道维护决策的有效性.
主要方法:
- 处理了ABA信号,以考虑测量速度的变化.
- 提取的尺度平均波量功率 (SAWP) 特性用于基底结构 (0.040.33 m-1) 和压载物 (1.252.50 m-1).
- 通过加权平均化常规TQI和ABA衍生特征来开发EnVTQI.
主要成果:
- 与传统的TQI不同,EnVTQI成功地区分了导致火车轨道相互作用差的轨道段.
- 综合方法提供了更全面的评估轨道状况在各个层.
- 在荷兰一条200米长的铁路线上,对48个段的性能进行了评估.
结论:
- 与传统的TQI相比,EnVTQI提供了一种优越的铁路轨道质量评估方法.
- 增强的索引可以更好地识别关键轨道缺陷,特别是在更深层.
- EnVTQI是现有方法的宝贵补充,增强了轨道维护策略.
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