打磨对减少钢轨表面发生缺陷频率的作用已经得到了试验结果的证实。这些试验是在北美铁路的一级线路区段上进行的,历时多年,试验总里程达到数千公里。1任务的提出对钢轨表面进行打磨,可以消除某些缺陷,特别是疲劳源性质的缺陷。先前进行的磨削效果的试验研究通常受铁路区段长度的限制,试验时间比较短,故此次试验考虑到了足够长的时间长度。在总长超过32 000 km铁路线路上,历时5年对钢轨磨削的 The effect of sanding on reducing the frequency of defects occurring on the rail surface has been confirmed by the test results. These tests were conducted on the first-tier line section of the North American Railway, which lasted for many years and totaled thousands of kilometers. 1 The task proposed to polish the rail surface, can eliminate some defects, especially the nature of the fatigue source defects. The experimental study of the grinding effect previously performed is usually limited by the length of the railway section and the test time is relatively short, so this test takes into account a sufficiently long time. Over a total length of more than 32,000 km on the railway line, which lasted 5 years on the rail grinding