非对称轮轨外形下踏面等效斜度计算

Equivalent Conicity Calculation for Unsymmetrical Wheel and Rail Profiles

踏面等效斜度是衡量轨道车辆曲线通过性能和导向性能的重要指标,它同时关系到车辆的行车安全和乘客乘坐舒适性(或货物的完整性),现今有诸多标准对此作出限定,也有多位研究者就其计算方法给出了不同的意见[1]。然而这些计算方法各有许多缺陷,且尚未在非对称的轮轨踏面外形下得以应用。此次研究基于一系列等效斜度的计算方法,提出了一种近似于UIC-519传统积分方法[2]的改进积分方法,这种积分方法具有较高的计算精度和比传统积分法更高的计算效率。此外,又将该方法应用于CRH高速列车等的非对称等效斜率计算中,研究了非对称情况下踏面等效斜度的影响因素及影响程度。

Equivalent conicity is an important index for evaluating the guide performance and curve-steering abili-ty of the rail vehicle. And it also concerns comfort and safety of the passengers （ or integrity of the goods） on the train. There have been many standards specifying this index in rail-vehicles and different scholars have presented their own ways to calculate the index. So far, the methods for calculating the equivalent conicity have more or less some advantages, which have never been applied to unsymmetrical conditions before. Based on calculation meth-ods of equivalent conicity, this paper proposes an improved integration method similar to UIC-519, which has higher calculation preciseness and efficiency. This method is then applied for calculating the equivalent conicity of unsymmetrical wheel and rail profiles in CRH high speed vehicles, thus illustrating the relevant influencing fac-tors of equivalent conicity under unsymmetrical conditions.