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中文摘要：
进行钢轨高速打磨试验是研究钢轨高速打磨机理的重要手段。而钢轨高速打磨试验台与打磨列车现场打磨作业的主要差别是试验台的钢轨沿纵向方向具有有限曲率半径,而现场钢轨沿纵向的曲率半径接近无限大。这一现象使得试验台上测得的砂轮与钢轨间的切向磨削力与现场打磨过程中的实际磨削力有差别。该文根据砂轮磨削原理建立了一种可考虑钢轨沿纵向曲率半径的砂轮切向磨削力计算方法。通过与试验数据的对比,表明该方法计算得到的磨削切向力与试验数据有较好的吻合。该文利用所建立的方法给出了将试验台切向磨削力修正到现场切向磨削力的修正系数k,并分析了打磨过程中的法向加载力以及圆盘曲率半径对k值的影响。
英文摘要：
High-speed rail grinding test-beds are an important tool to study the mechanism of high-speed grinding. The main difference between the test condition and the real grinding process is that the radii of curvature along the longitudinal direction are different between the test-bed and real grinding. The rail has a finite radius on the test-bed but is straight in reality. This may lead to differences between the tangential grinding force measured on the test-bed and what happens in real grinding. In this paper, a method is established based on the theory of grinding to calculate the tangential grinding force taking the radius of curvature of the ground rail into consideration. The calculated tangential grinding force agrees well with experimental measured grinding force on the test-bed. A correction factor k is proposed based on this method to eliminate the error of the tangential grinding force measured on the test-bed. The effects of normal loading and the radius of the rail on the correction factor k are studied using the established method.
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