我国铁路较大部分是山区铁路，曲线多，特别是小半径曲线，钢轨更换的主要原因是磨耗。调查资料表明，我国小半径曲线铁路上的钢轨有98％是由于磨耗超限而报废的。曲线钢轨侧面磨耗又在磨耗超限中占较大比例。影响侧面磨耗的因素很多，主要有轨道结构几何状态，机车车辆走行部? The greater part of China’s railways are mountainous railways, with many curves, especially the small radius curve. The main reason for rail replacement is abrasion. According to the survey data, 98% of the rails on the railway with small radius curve in our country are scrapped due to the wear-out limit. Curved rail side wear again in the wear out of a larger proportion. Affect the side wear a lot of factors, the main geometric state of the track structure, running department of rolling stock?