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。
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 s tudies, 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 numerical ly. It is shown that the contact spot shape,contact surface stress distribution,the stick sl ip area distribution as wel l 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 rel iable foundation for the research of wheel/rail fatigue in the future.
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2017年第1期133-142,共10页
Journal of East China University of Science and Technology
关键词
轮轨接触
曲线轨道
表面应力
内部应力
计算方法
wheel / rail contact
curved track
surface stress
internal stress
calculat ion method
