Dynamic Analysis of a High-Speed Railway Train With the Defective Axle Bearing

IF 0.8 4区工程技术 Q4 ACOUSTICS

International Journal of Acoustics and Vibration Pub Date : 2020-12-30 DOI:10.20855/ijav.2020.25.41701

Jing Liu, S. Du

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引用次数: 4

Abstract

Axle bearings (AXBs) are critical parts for high-speed railway trains (HSTs). Local faults in the AXBs have great influences on the operational dynamics of HSTs. Although some previous works formulated the local faults in single AXB, the vibrations of the whole train system with the defective AXB cannot be described. To overcome this problem, this study conducts a dynamic model for a HST considering a local fault in one AXB. The previous single AXB model cannot formulate the studied case. The impacts caused by the fault in the AXB is defined as a time-dependent force model considering a half-sine type. The road spectrum excitations from the roadbed and rail are formulated by a track irregularities model. The effects of the train speeds and fault sizes on the HST dynamics are introduced. The simulation results from the proposed and previous works are contrasted to show the model validation. The results show that the faults in the AXB will greatly affect the HST dynamics. It depicts that this study can afford a more reasonable approach for understanding the dynamics of HSTs considering the defective AXBs compared to the reported single AXB model.

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高速铁路车轴轴承故障列车的动力学分析

轴轴承是高速铁路列车的关键部件。轴向轴的局部故障对轴向轴的运行动力学影响很大。虽然以前的一些著作描述了单个轴轴的局部故障，但无法描述整个列车系统的振动。为了克服这一问题，本研究建立了考虑一个AXB局部故障的HST动态模型。以往单一的AXB模型无法表述所研究的案例。在考虑半正弦型的情况下，将AXB中故障引起的冲击定义为随时间变化的力模型。路基和轨道的路谱激励用轨道不规则性模型表示。介绍了列车速度和故障大小对高速列车动力学的影响。仿真结果与前人的研究结果进行了对比，验证了模型的有效性。结果表明，轴轴上的故障对HST的动力学影响很大。这表明，与报道的单一AXB模型相比，本研究可以提供一种更合理的方法来理解考虑缺陷AXB的HSTs动力学。

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

International Journal of Acoustics and Vibration ACOUSTICS-ENGINEERING, MECHANICAL

CiteScore

1.60

自引率

10.00%

发文量

审稿时长

12 months

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