柔性轮对的地铁曲线段内轨波磨迁移特性研究
Research on the Migration Characteristics of Rail Corrugation in Curved Section of Subway Based on Flexible Wheelset Model
朱文杰 1尧辉明1
作者信息
- 1. 上海工程技术大学城市轨道交通学院 上海 201620
- 折叠
摘要
为预防波磨从一侧钢轨迁移至另一侧,建立了柔性轮对的车辆-轨道曲线通过刚柔耦合动力学模型,再现了地铁车辆曲线段时的轮轨接触行为,分析了曲线内轨不同特征波长波磨产生的振动响应和磨耗功率.相比传统多刚体模型,车辆-轨道刚柔耦合模型能将轮对弯曲、扭转和高频振动考虑在内.针对波长极短的40 mm短波、80 mm短波、150 mm中波和200 mm长波波磨四种工况进行仿真,结果表明:随着波长增加,波磨迁移现象越容易产生.对于波长较短的短波引起单侧高频轮轨冲击但波磨不易迁移至另一侧;80 mm短波引起的振动较小,也不易发生迁移;当波长增加至150 mm中长波和200 mm长波后,外轨轮轨力振动开始加剧,150 mm工况外轨纵向轮轨力振荡明显增加,200 mm工况纵向和垂向轮轨力已接近波磨所在侧的振荡幅值,此时很可能发生波磨迁移的现象.
Abstract
To prevent wave wear from transferring from one rail to the other,a rigid-flexible coupling dynamic model of vehi-cle-track curve with flexible wheelset is established,the wheel-rail contact behavior of subway vehicles in curve section is repro-duced,the vibration response and wear power generated by wave grinding with different characteristic wavelengths of the inner rail of the curve are analyzed.Compared with the traditional multi-rigid-body model,the vehicle-track rigid-flexible coupling model can take wheelset bending,torsion and high frequency vibration into account.The simulation is carried out for the four working condi-tions with different wavelengths of 40 mm,80 mm,150 mm and 200 mm.The simulation results show that with the increase of wave-length,the phenomenon of wear migration is more likely to occur.For the short-wavelength rail corrugation,high-frequency wheel-rail impact is caused by one side but the wear is not easy to migrate to the other side.The vibration led by 80mm short-wave-length is small and wear migration is also not easy.When the wavelength increases to 150 mm and 200 mm,the wheel/rail force vi-bration of the outer rail begins to intensify.In condition of 150 mm,the longitudinal wheel/rail force oscillation of the outer rail in-creases obviously,and in condition of 200 mm,the oscillation amplitude of longitudinal and vertical wheel/rail force has ap-proached the inner side where the rail corrugation is located.At this time,the migration phenomenon of rail corrugation is likely to occur.
关键词
柔性轮对模型/波磨迁移/钢轨波浪形磨损/波磨波长/曲线通过模型Key words
flexible wheelset modeling/wear migration of rail corrugation/rail corrugation/the wavelength of rail corruga-tion/curve negotiation引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
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