作　　者： ; ; ; ;

机构地区： 西南交通大学电气工程学院牵引动力国家重点实验室

出　　处： 《机械工程学报》 2011年第2期115-122,共8页

摘　　要： 以轮对滚动圆半径差为设计目标,根据3次样条理论建立铁路车轮型面数值优化设计模型。用3次样条有效地光滑车轮型面,而轮对滚动圆半径差则决定了车辆动力学性能。作为模型的算例,为提高LMA型面轮对的曲线通过能力,通过增大轮对滚动圆半径差的控制目标,对LMA型面轮缘根部进行优化设计,并详细地分析设计车轮型面的轮轨滚动接触和车辆动力学特性。结果表明,与LMA型面相比,优化后的车轮型面尽管轮缘根部接触压力、应力有所提高,但车辆曲线通过能力得到了显著地提高,而车辆的临界速度、平稳性、安全性等指标基本不变,对LMA型面的优化设计达到了预期目的。说明了提出的基于轮对滚动圆半径差控制模型的有效性和可行性。 Wheelset rolling radius difference（RRD） is taken as the design objective,a numerical optimal design model for railway vehicle wheel profile is built on the basis of the cubic spline theory.The cubic spline is used to efficiently smooth the wheel profile,and RRD determines the vehicle dynamics performance.As an example,to improve curving ability of LMA wheelset,the present model is used to improve the wheelset rolling radius difference,which mainly optimizes the flange root region of the LMA wheel profile.The rolling contact and dynamic behavior of the improved wheel profile are analyzed in detail.The results show that,in comparison with the LMA profile,though contact pressure and stress increase in the flange root region of the wheel,the improved wheel profile significantly improves the vehicle curving performance,other indices such as vehicle critical speed,performance,and safety index are basically unchanged.The optimization of LMA wheel profile reaches the expected goal.The example demonstrates the effectiveness and the feasibility of the proposed model based on the wheelset rolling radius difference control.

关 键 词： 车轮型面设计 轮对滚动圆半径差 数值优化 曲线通过性能 车辆动力学

领　　域： [交通运输工程]