Evaluation of dynamic responses in steel lever of leveling valve during metro train operations

IF 5.2 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Measurement Pub Date : 2025-06-17 DOI:10.1016/j.measurement.2025.118198

Ziyu Tao , Yuling Wang , Wai Kei Ao , Fangru Zhou , Duo Zhang , Yi-Qing Ni

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引用次数: 0

Abstract

Metro trains operating in tunnel environments with frequent dust exposure may lead to fatigue and ductile deformation in steel components due to insufficient movement caused by joint sticking. To avoid train operation accidents, this paper investigated the impact of joint sticking on the dynamic stress of the lever and link system for assessing the potential fatigue damage. A comprehensive onboard measurement campaign was conducted to study the experienced vibrations during train operations. The field measurements encompassed a total of 255 train events conducted between metro stations, during which the leveling valve was newly installed and operated without any malfunctions. An effective and precise impedance-based analytical model was developed to accurately assess the impact of joint sticking on the dynamic stresses. The validity of the proposed model was confirmed by comparisons with both numerical simulations and field measurements data. It achieves millisecond-scale solutions for all tested excitations, far outperforming FEM, which requires hundreds to thousands of seconds. Finally, the validated analytical model was utilized to quantify the effects of joint sticking on the dynamic stress of the lever and link system. The results emphasize that although joint sticking does not directly induce fatigue damage, it significantly amplifies the stress within the components by up to 14 times. It is advisable to prioritize periodic inspections and maintenance activities, especially for the joint connected to the bogie.

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地铁列车运行中调平阀钢杆的动力响应评价

地铁列车在隧道环境中运行，经常接触粉尘，可能会导致钢构件因关节粘连而运动不足而产生疲劳和延性变形。为了避免列车运行事故的发生，本文研究了接头粘接对杠杆和连杆系统动应力的影响，以评估其潜在的疲劳损伤。为了研究列车运行过程中所经历的振动，开展了一项全面的车载测量活动。现场测量包括在地铁站之间进行的总共255次列车事件，在此期间新安装了调平阀，并且没有出现任何故障。建立了一种有效、精确的基于阻抗的分析模型，以准确评估接头粘接对动应力的影响。通过与数值模拟和现场实测数据的比较，验证了该模型的有效性。对于所有测试的激励，它可以实现毫秒级的解决方案，远远优于需要数百到数千秒的FEM。最后，利用验证后的分析模型，定量分析了接头粘接对连杆系统动应力的影响。结果表明，接头粘接虽然不会直接引起疲劳损伤，但会使构件内部的应力显著增大14倍。建议优先进行定期检查和维护活动，特别是与转向架相连的接头。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Measurement 工程技术-工程：综合

CiteScore

10.20

自引率

12.50%

发文量

1589

审稿时长

12.1 months

期刊介绍： Contributions are invited on novel achievements in all fields of measurement and instrumentation science and technology. Authors are encouraged to submit novel material, whose ultimate goal is an advancement in the state of the art of: measurement and metrology fundamentals, sensors, measurement instruments, measurement and estimation techniques, measurement data processing and fusion algorithms, evaluation procedures and methodologies for plants and industrial processes, performance analysis of systems, processes and algorithms, mathematical models for measurement-oriented purposes, distributed measurement systems in a connected world.