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Rail Pre-Grinding on Shanghai-Nanjing PDL and Its Effect on Wheel-Rail Contact Geometry

机译：轨道预研磨上海南京PDL及其对轮轨接触几何的影响

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摘要

The paper tests the rail profiles of Shanghai-Nanjing PDL after its rail pre-grinding. The grinding values are counted, which shows that the grinding mainly occurs on the inner side of rail top, ranging from 0 to 1.26 mm. Wheel-Rail Contact Geometry is also analyzed. Results shows that after pre-grinding, the wheel-rail contact points concentrate to the center of rail top, and it is good for rail wear control. But the rolling radius difference decreases and it weakens the rail's ability of return the wheel's position.
机译：本文在铁路预研磨后测试了上海南京PDL的轨道轮廓。计算研磨值，这表明研磨主要发生在轨道顶部的内侧，范围为0至1.26mm。还分析了轮轨接触几何体。结果表明，在预研磨后，车轮轨道接触点集中到轨道顶部，轨道磨损控制是良好的。但滚动半径差异降低，它削弱了返回车轮位置的轨道能力。

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