高速列车轴箱轴承的复合故障机理和振动特性

IF 3.4 Q1 ENGINEERING, MECHANICAL 国际机械系统动力学学报(英文) Pub Date : 2024-06-01 DOI:10.1002/msd2.12108
Weixu Zhao, Yongqiang Liu, Baosen Wang, Yingying Liao
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引用次数: 0

摘要

轴箱轴承是高速列车的关键部件,其运行条件极具挑战性。随着服务里程的增加,这些轴承容易出现各种故障,给高速列车运行带来安全风险。因此,研究轴箱轴承的部署方法至关重要。在单故障模型的基础上,通过在两列双列圆锥滚子轴承中分别设置故障,构建了高速列车轴箱轴承复合故障动态模型。通过相应的实验结果验证了该模型在表达复合故障方面的高准确性。然后,获得了不同转速条件下系统振动响应的频域图,并提取和分析了单频对应的振幅,从而确定了复合故障诊断的最佳转速带。最后,分析了不同故障、不同负载大小和不同复合故障类型下的最佳转速带。可以得出结论,最佳转速带的确定仅受复合故障类型的影响,与故障和负载大小无关。最后得出的结论是,不同位置故障的能量比例随速度变化而周期性变化,这一现象不受故障大小或负载大小的影响。
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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Composite fault mechanism and vibration characteristics of high-speed train axle-box bearings

Axle-box bearings are crucial components of high-speed trains and operate in challenging conditions. As service mileage increases, these bearings are susceptible to various failures, posing a safety risk to high-speed train operations. Thus, it is crucial to examine the deployment methods of axle-box bearings. A dynamic model of axle-box bearings for high-speed trains with compound faults is constructed by setting up separate faults in two rows of double-row tapered roller bearings based on a single-fault model. The model's high accuracy in expressing compound faults is verified through corresponding experimental results. Then, the frequency domain diagram of system vibration response under varying rotational speed conditions is obtained, and the amplitude corresponding to the single frequency is extracted and analyzed to identify the optimal rotational speed band for composite fault diagnosis. Finally, the optimal speed band is analyzed under different faults, different load sizes, and different composite fault types. It can be concluded that the determination of the optimal speed band is solely influenced by the composite fault type and is independent of the fault and load sizes. Finally, it is concluded that the energy proportion of faults in different positions changes periodically with the change in speed, and this phenomenon is not affected by the fault sizes or load magnitude.

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