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提出一种基于逆向工程概念的铁路车辆轮踏面外形的设计新概念,导出以轮径差和接触角差相对于轮对横移量的函数为设计目标的逆向设计数值算法,实现了通过轮径差或接触角差函数将车辆动力学要求与车轮踏面外形设计的直接沟通,可以指定需要的等效斜度和轮径差等信息反求踏面外形,并且还能同时计及钢轨的实际外形、轨底坡和接触点的分布位置、并研制相应的计算机程序。基于轮径差函数的算法适用于刚性轮对的踏面外形设计,可以设计出不同速度要求与曲线通过导向性能要求的踏面外形;基于接触角差的算法适用于独立轮对的踏面外形设计,可以设计出具有不同重力复原刚度的踏面外形。通过几个算例验证了这种方法及其软件的可行性。
A new design concept of railway vehicle wheel tread profile based on the concept of reverse engineering was proposed. A reverse design numerical algorithm based on reverse wheel diameter and contact angle difference as a function of wheelset traverse displacement was derived. Difference or Contact Angle Difference Function Direct communication between vehicle dynamics requirements and wheel profile design allows you to specify information such as equivalent pitch and wheel diameter differences required for reverse profile and also account for the actual shape of the rail, Rail slope and the location of contact points, and the development of the corresponding computer program. The algorithm based on the wheel diameter difference function is suitable for the profile design of the tread of a rigid wheelset and can design the profile of the tread with different speed requirements and curves required by the guide performance requirements. The algorithm based on the contact angle difference is suitable for tread profile design of an independent wheelset, Design tread profiles with different gravitational stiffness. Several examples are given to verify the feasibility of this method and its software.