钢轨非对称廓型的设计方法

Design Method of Rail Asymmetric Silhouette

为科学确定钢轨非对称廓型,指导打磨作业,基于经典的轮轨接触几何学和接触力学,建立了以等效锥度、接触应力水平和打磨量等为评判依据的设计与评价方法,以比选确定最优打磨方案.实例分析表明,这种方法综合考虑了不同打磨方案对曲线通过性能、滚动接触疲劳和打磨成本等关键因素的影响,可以为目标廓型的选择提供参考.

In order to determine the asymmetric silhouette of rail scientifically to guide the asymmetric grinding of rail,a method of designing the asymmetric silhouette and evaluating the asymmetric grinding was proposed based on the classical wheel/rail contact geometry.The judgment bases of this method are equivalent taper,contact stress level,grinding quantity,and so on.A case study shows that this comprehensive evaluation method considers the effects of different grinding schemes on curve performance,rolling contact fatigue and grinding cost to provide a theoretical basis for objective silhouette selection and design.