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铁路曲线区段轮轨接触应力计算方法
黄龙文,李正美,安琦
作者单位E-mail
黄龙文 华东理工大学机械与动力工程学院, 上海 200237  
李正美 华东理工大学机械与动力工程学院, 上海 200237  
安琦 华东理工大学机械与动力工程学院, 上海 200237 anqi@ecust.edu.cn 
摘要:
以客车磨耗型踏面车轮通过铁路曲线段时的轮轨接触问题为研究对象,在前期研究的基础上,引入切向力计算模型,建立了能够对曲线路段轮轨接触表面应力和内部应力进行精确计算的数学模型。结合具体算例,数值计算了不同接触位置处接触斑上的应力分布和轮轨内部的Mises应力和最大剪应力,并选择一个具体接触位置深入计算了列车通过曲线路段时弯道半径、运行速度、外轨超高值、轴质量等因素对轮轨接触表面应力和内部应力的影响规律,发现当接触位置变化时,接触斑形状、接触表面应力分布、黏滑区分布以及轮轨内部的Mises应力和最大剪应力分布也在不断变化,得出了一系列规律性的曲线,并进行了分析讨论,为进一步研究轮轨接触疲劳寿命问题提供了理论依据。
关键词:  轮轨接触  曲线轨道  表面应力  内部应力  计算方法
DOI:10.14135/j.cnki.1006-3080.2017.01.021
分类号:
基金项目:
Calculation Method of Wheel/Rail Contact Stress When Passing through Curved Track
HUANG Long-wen,LI Zheng-mei,AN Qi
Abstract:
In this paper,the wheel/rail contact problem when worn tread wheel of passenger trains running on curved track is studied.On the basis of the authors' previous studies,a mathematical model which can accurately calculate wheel/rail contact surfaces stress and inner stress is established by introducing the tangential force calculation model.In addition,an example is carried out to calculate the contact surface stress distribution and the Mises stress and the maximum shear stress at different contact positions.Furthermore,the effects of curve radius,train speed,superelevation and axle load on contact surfaces stress and inner stress are calculated and analyzed numerically.It is shown that the contact spot shape,contact surface stress distribution,the stick slip area distribution as well as the Mises stress and the maximum shear stress are changing constantly with the change of contact position.A series of regular curves are obtained and discussed.The research in this paper can provide reliable foundation for the research of wheel/rail fatigue in the future.
Key words:  wheel/rail contact  curved track  surface stress  internal stress  calculation method

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