Influence of asymmetric out-of-roundness coupled with wear of subway wheels on vehicle dynamics

Autor:	Caozheng Fu, Hongxiao Li, Jianwei Yang, Si Yang, AiHua Zhu, Qiang Li
Rok vydání:	2020
Předmět:	Physics Mechanical Engineering media_common.quotation_subject 05 social sciences 050301 education 02 engineering and technology Mechanics Asymmetry Roundness (object) Vehicle dynamics 020303 mechanical engineering & transports 0203 mechanical engineering Tread 0503 education media_common
Zdroj:	Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit. 235:748-762
ISSN:	2041-3017 0954-4097
Popis:	Out-of-roundness and tread wear are common types of damage to subway wheels, which greatly affect the dynamic performance of subway vehicles. In light of the coupling and asymmetry of out-of-roundness and tread wear found in real-world subway wheels, an analysis method that considers asymmetric out-of-roundness coupled with tread wear was proposed for vehicle dynamics. A vehicle dynamics model featuring asymmetric out-of-roundness coupled with tread wear was used to investigate the influences of asymmetric wheel damage and coupled damage on the dynamic performance of the vehicle system. The vehicle’s dynamic performance was simulated under different conditions, including asymmetric out-of-roundness and symmetric out-of-roundness, uncoupled damage and coupled damage, asymmetric coupled damage and symmetric coupled damage. Then the estimated data was compared against the measured data. The study finds that the vertical wheel/rail contact force, lateral wheel/rail contact force, derailment coefficient and wheel unloading rate increased in the case of asymmetric out-of-roundness. In the presence of coupled damage, the degree of tread wear had a relatively great influence on the lateral wheel/rail contact force, axle lateral force, and derailment coefficient, but had little influence on the vertical contact force. Compared to symmetric coupled damage, asymmetric coupled damage had a greater influence on peak vertical vibration acceleration and stability index, and their values are closer to the measured values in the case of asymmetric coupled damage. This suggests that the dynamics model that considers asymmetric out-of-roundness coupled with tread wear can provide more accurate results as guidance on the maintenance and overhaul of subway wheels.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::550f7c0b0a442cb0e62562f6a4e299a2 https://doi.org/10.1177/0954409720962245 Zobrazit plný text záznamu