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总结分析尖轨矫直前原始变形规律,并对变形进行分类,研究了尖轨矫直支点压点组合方法,采用弹塑性有限元方法建立了尖轨矫直三维实体模型,并计算尖轨矫直加载量。结果表明,尖轨矫直前初始变形分为单弯型、波浪型和空间曲线型三类,交替使用逐一矫直法和优先矫直法,可提高矫直效率;相同初始曲率半径下,所需加载量随加载支距增加而增加;相同加载支距下,所需加载量随初始曲率半径增大而减小;矫直后轨底残余拉应力随尖轨初始曲率半径增大而增大。
This paper summarizes and analyzes the original deformation law before the straightening and classifies the deformation, studies the combination method of the point straightening point of the straightening rail. The three-dimensional solid model of the straightening rail is established by using the elasto-plastic finite element method. Load. The results show that the initial deformation of the sharp rail before straightening is divided into three types: single curve, wave type and spatial curve type. The straightening method and the straightening method are alternately used to improve the straightening efficiency. Under the same initial radius of curvature, The loading increases with the increase of loading distance. With the same loading distance, the required loading decreases with the increase of initial radius of curvature. The residual tensile stress at rail bottom increases with the initial curvature radius of the rail after straightening.