曲线钢轨波磨的微观机理仿真研究
Simulation Study on the Microscopic Mechanism of Wave-Grinding of Curved Rail
高利君1
作者信息
- 1. 山西铁道职业技术学院,太原 034300
- 折叠
摘要
建立单轮对曲线通过动态仿真模型,对钢轨波浪形磨耗(以下简称波磨)的微观机理进行仿真研究.Simulink模型的建立考虑了轮对的弹性体模态、轨道的横向弹性、波磨段轴重的余弦振荡、轮轨间的黏滑振动、实际蠕滑力特性曲线的负梯度特性与饱和点右移特征.仿真结果表明,在无波磨段的圆曲线轨道上发生了均匀的轮轨黏滑振动,在初期波磨段发生了周期性的不均匀黏滑振动,解释了初期波磨产生的微观机理.
Abstract
Through dynamic simulation model,microscopic mechanism of rail wavy-grinding is simulated and studied.The establishment of the Simulink model considers the elastic mode of wheelset,the transverse elasticity of track,the cosine oscillation of the axial load in the wave wear section,the stick-slip vibration between wheel and rail,the negative gradient characteristic of the actual creep force curve and the right shift of saturation point.The simulation results show that uniform stick-slip vibration occurs in the circular curve track without wave wear,and periodic non-uniform stick-slip vibration occurs in the initial wave wear,which explains the microscopic mechanism of the initial wave wear.
关键词
曲线钢轨/波磨/微观机理/黏滑振动Key words
curved rail/wave-grinding/microscopic mechanism/stick-slip vibration引用本文复制引用
出版年
2024
NETL
NSTL
万方数据