Abstract Axle box bearings are important parts of rail vehicle running gear. Currently, there is limited research on the coupling modeling of an axle box bearing and rail vehicle. In this paper, a complete method for bearing modeling with multitype defects is proposed. The bearing kinematics with three translation and one rotation degrees of freedom are analyzed and modeled, and defect modeling algorithms for the inner raceway, outer raceway and rollers are proposed. The theoretical rolling tracks of rollers passing through the defect points are analyzed and formulated. By coupling the bearing model to the motion joint of the shaft end and axle box, a closed-loop bearing-vehicle model is established. Model simulations show that the calculated results for normal bearings, different types of bearing defects and the bearing-vehicle coupling model are consistent with the theoretical values. The novel and complete coupling model proposed in this paper has the advantages of having a simple algorithm, high computational efficiency, and accurate simulation of the bearing vibration response under train running conditions, which can provide important guidance for research on the response of an axle box bearing in train running gear. By establishing a bearing-vehicle coupling model that simulates the bearing vibration response, especially when the bearings have faults, the performance of the defective bearing can be better understood and applied to develop diagnostic algorithms for the condition monitoring of axle box bearings in a rail vehicle.

中文翻译：

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多型缺陷轨道车辆与行走机构轴承耦合模型及振动仿真

摘要 轴箱轴承是轨道车辆行走机构的重要部件。目前，对轴箱轴承与轨道车辆耦合建模的研究还很有限。本文提出了一种完整的多类型缺陷轴承建模方法。对具有三平移一旋转自由度的轴承运动学进行了分析和建模，提出了内滚道、外滚道和滚子的缺陷建模算法。分析并制定了滚子通过缺陷点的理论滚动轨迹。通过将轴承模型耦合到轴端和轴箱的运动关节，建立闭环轴承-车辆模型。模型模拟表明，正常轴承的计算结果，不同类型的轴承缺陷和轴承-车辆耦合模型与理论值一致。本文提出的新颖完整的耦合模型具有算法简单、计算效率高、能准确模拟列车运行工况下轴承振动响应等优点，可为轴箱响应的研究提供重要指导。列车运行装置中的轴承。通过建立轴承-车辆耦合模型来模拟轴承振动响应，特别是当轴承出现故障时，可以更好地了解故障轴承的性能，并将其应用于开发轨道车辆轴箱轴承状态监测的诊断算法. 本文提出的新颖完整的耦合模型具有算法简单、计算效率高、能准确模拟列车运行工况下轴承振动响应等优点，可为轴箱响应的研究提供重要指导。列车运行装置中的轴承。通过建立轴承-车辆耦合模型来模拟轴承振动响应，特别是当轴承出现故障时，可以更好地了解故障轴承的性能，并将其应用于开发轨道车辆轴箱轴承状态监测的诊断算法. 本文提出的新颖完整的耦合模型具有算法简单、计算效率高、能准确模拟列车运行工况下轴承振动响应等优点，可为轴箱响应的研究提供重要指导。列车运行装置中的轴承。通过建立轴承-车辆耦合模型来模拟轴承振动响应，特别是当轴承出现故障时，可以更好地了解故障轴承的性能，并将其应用于开发轨道车辆轴箱轴承状态监测的诊断算法. 可为列车行走机构轴箱轴承响应的研究提供重要指导。通过建立轴承-车辆耦合模型来模拟轴承振动响应，特别是当轴承出现故障时，可以更好地了解故障轴承的性能，并将其应用于开发轨道车辆轴箱轴承状态监测的诊断算法. 可为列车行走机构轴箱轴承响应的研究提供重要指导。通过建立轴承-车辆耦合模型来模拟轴承振动响应，特别是当轴承出现故障时，可以更好地了解故障轴承的性能，并将其应用于开发轨道车辆轴箱轴承状态监测的诊断算法.