（1.内蒙古科技大学 机械工程学院，内蒙古 包头，014010；2.包头钢铁（集团）公司 轨梁厂，内蒙古 包头，014010）
关键词：重轨；矫直；残余应力；数值模拟：Workbench
中图分类号： TH16 文献标识码：A
摘要：本文采用ANSYS Workbench对重轨矫直过程进行有限元数值模拟，利用某钢厂提供的现场矫直数据，采用三维建模软件Pro/E建立了60kg/m重轨九辊矫直模型，对矫直过程中重轨经在各矫直区下的应力的内部应力状态及其演变规律进行了分析研究。模拟结果表明重轨在矫直过程中轨头应力状态呈压-拉交替变化，轨底应力状态呈拉-压交替变化，矫后纵向残余应力呈“C”字形分布，轨底最大残余应力值符合满足小于250MPa的标准要求。
Simulationresearch of longitudinal stress variety in the process of horizontalstraightening of heavy rail
Guo Xiping1，FangWeixin1，Wang Yan1，ZhouShuang2
（1.Department ofMechanical Engineering,Inner Mongolia University of Science & Tecnology, Baotou 014010,China；
2.Railand Beam Plant of Baoutou Iron and Steel Group,Baotou,014010,China）
Key words：heavy rail；straightening；straightening speed；residual stress；numericalsimulation
Abstract： FEM numericalsimulation of heavy rail straightening process was carrried out using ANSYSWorkbench，and themodel of nine-roller straightening was established based on Pro/E with thestraightening data provided by a steel factory. The research and analysis were madeon the state of internal stress under each straightening zone,and its evolutionlaw.The results of the simulation shows that the stress state of the rail headduring straightening process was changed from compressive to tensile alternately;the stress state of rail bottom during straightening process alternatelychanges from tensile to compressive; the distribution of the residuallongitudinal stress after straightening is C-shaped;and the maximum value ofrail bottom residual stress satisfy the standard requirement of less than 250MPa.