Stability of high-speed train axle box bearing cage under external vibration excitation

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (9) : 16-24.

VIBRATION THEORY AND INTERDISCIPLINARY RESEARCH

Stability of high-speed train axle box bearing cage under external vibration excitation

TU Wenbing1,2*, GAO Hong2 ，HUANG Yibin2，GE Keke2，LOU Yuankuo2，XU Yong3

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Abstract

The high-speed train is in a strong vibration environment. External vibration excitation changes the internal dynamic excitation of the axle box bearings, which has an important impact on the movement stability of the cage. In this paper, axle-box bearing was taken as the research object, taking into account the dynamic contact relationship between the cage, guide rings and rolling elements, and the hydrodynamic pressure effect of lubricating oil. A three-degree-of-freedom axle-box bearing dynamic model of the cage was established, and the influence of the direction and parameters of external vibration excitation on the stability characteristics of the cage was studied. The results show that external vibration excitation mainly affects the interaction between the cage and the guide ring, and then affects the movement stability of the cage; compared with longitudinal vibration, lateral vibration has a more significant impact on the movement stability of the cage, with the change of excitation parameters, the fluctuation range of the cage's centroid trajectory changes significantly; when the external vibration excitation parameters in different directions are close, a local minimum will appear in the fluctuation range of the cage's centroid trajectory. The results of this paper can provide theoretical basis for the design and failure mechanism of axle-box bearing cages.

Key words

axle box bearing / dynamics / external vibration excitation / cage stability

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TU Wenbing, GAO Hong, HUANG Yibin, GE Keke, LOU Yuankuo. Stability of high-speed train axle box bearing cage under external vibration excitation[J]. Journal of Vibration and Shock, 2025, 44(9): 16-24

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