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中文摘要：
综述国内外车轮磨耗理论模型及其数值方法,提出基于车辆轨道垂、横向耦合动力学、轮轨滚动接触力学和材料摩擦磨耗模型为一体的车轮磨损计算模型,并发展相应的数值方法。模型中车辆结构和钢轨下部结构被简化成等效质量、弹簧和阻尼系统,而钢轨用Euler梁代替,并考虑它的垂向、横向弯曲变形和扭转变形。利用修改的KALKER三维弹性体非Hertz滚动接触理论和相应的数值方法计算轮轨蠕滑力和滑动量等参量;根据Archard材料磨损模型计算车轮的磨耗深度。利用该模型和相应的数值方法分析不同曲线半径情况下车轮的磨损情况,结果表明该模型可以较好地模拟车轮磨损的演化过程。给出列车通过曲线半径为350m时车轮的磨损情况。数值结果表明,每个转向架下前轮对比后轮对磨耗严重,外轨上的车轮比内轨上的车轮磨耗严重。
英文摘要：
The existing theoretical models and numerical methods of railway wheel wear are reviewed. A model, in which the wheel material wear model, the non-Hertzian roiling contact theory of wheel and rail system and coupling dynamics of rail vehicle and track in the vertical and lateral directions are combined, is developed to predict the wheel profile wear. A passenger car and the structure under the rails are replaced by the systems consisting of dampers, springs and equivalent mass bodies, and the Euler beam is utilized to model the rails accounting for bending and torsional deformations, Kalker＇s non-Hertzian rolling contact theory of three-dimensional elastic bodies is modified to calculate the creep forces, sliding distance etc in the contact patch. The wear depth of the wheel profile is calculated by using the well-known Archard wear taw. The presented model and its numerical method are used to analyze the wear of the wheel on the curves with various radii. The resu Its show that this model is feasible to predict the evolution of railway wheel wear. Some wear results of wheel passing through 350 m curve are presented. A conclusion can be drawn from the numerical results that the wear of the leading wheelset is severer than the trailing wheelset in each bogie. The wear of wheels on the outer rail is more serious than wheels on the inner rail.
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