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采用城市轨道车辆标准型面车轮与标准型面钢轨相匹配,建立不同轨底坡的车轮与钢轨三维弹塑性接触有限元模型,根据计算得出的接触斑面积、接触应力等结果分析轨底坡对钢轨磨耗的影响。计算分析结果表明:无轨底坡时,车轮与钢轨的接触位置总是靠近钢轨内侧,导致钢轨内侧磨耗严重;随着钢轨轨底坡的增大,轮轨的接触位置逐渐向钢轨外侧移动,接触应力也发生变化,1/40轨底坡下轮轨接触应力较小,钢轨磨耗较慢;单独增大内轨轨底坡对减缓钢轨侧磨非常有利。
The three-dimensional elasto-plastic contact finite element model of the wheel and the rail with different rail slopes is established by matching the standard type surface wheels of the urban rail vehicles with the standard profiled rails. Based on the calculated contact patch area, contact stress and other results, Impact on rail wear. The calculation and analysis results show that the contact position between the wheel and the rail is always close to the rail inside, resulting in serious wear on the rail. With the increase of the rail slope, the contact position of the rail and rail gradually moves to the outside of the rail, The stress also changed. The contact stress of lower wheel rail under 1/40 rail was lower and the rail wear was slower. Increasing the inner rail slope alone would be very beneficial to reduce side rail wear.