Fatigue Life Prediction of Multiple Unit Axle Considering Wheel Polygon

doi:10.3969/j.issn.1004-132X.2024.07.018

Abstract

Abstract: Taking the axle of a certain type of high-speed locomotive set as research object and the measured polygonal abrasion as input, the effects of polygonal abrasion on the fatigue damage of axle were analyzed at the speed of 300 km/h, which was based on the rigid-flexible coupling dynamics model of vehicle track considering wheel-rail flexibility, the finite element model of wheelset, and the multiaxial fatigue model. The results show that under the influences of polygonal wear, the loaded condition of the wheelset fluctuates drastically and has significant periodicity, and the load fluctuation is related to the orders of polygonal wear. Under the influences of 18 orders of polygonal wear, the service life of the axle of high-speed locomotives is reduced to 22 years, which is less than the design life of axle as stipulated in Regulations on the Operation and Maintenance of Railway Locomotives.

Key words: wheel polygon, axle, vehicle system dynamics, finite element, critical plane, fatigue life

摘要： 以某型高速动车组车轴为研究对象，基于考虑轮轨柔性的车辆轨道刚柔耦合动力学模型、轮对有限元模型和多轴疲劳模型，以实测多边形磨耗为输入，在速度300 km/h下分析了多边形磨耗对车轴疲劳损伤的影响。研究表明：在多边形磨耗的影响下，轮对受载状态剧烈波动并具有显著的周期性，且受载波动情况与多边形磨耗阶次相关。在18阶多边形磨耗影响下，高速动车组车轴的服役寿命降低至22年，小于《铁路动车组运用维修规程》规定的车轴设计寿命。

关键词: 车轮多边形, 车轴, 车辆系统动力学, 有限元, 临界平面, 疲劳寿命

CLC Number:

靳智超1, 梁红琴1, 卢纯1, 胡文1, 许珂1, 陶功权2, 温泽峰2. 考虑车轮多边形的动车组车轴疲劳寿命预测[J]. 中国机械工程, 2024, 35(07): 1299-1307.

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