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针对矫直速度对重轨矫后残余应力的影响进行研究,利用Pro/E建立60kg·m-1重轨九辊水平矫直模型,采用ANSYS Workbench对重轨矫直过程进行有限元数值模拟,通过现场矫直规程对采用现场矫直速度以及假定矫直速度得到的重轨矫后残余应力进行分析比较,得出了在其余条件不变的情况下重轨的矫直速度在1.4~1.6m·s-1的范围内其轨底矫后纵向残余拉应力小于250MPa,且残余应力分布合理,满足矫直要求,相比于现场采用的1.2m·s-1的矫直速度其生产效率最大能够提高16.7%~33.3%。
Aiming at the effect of straightening speed on the residual stress of heavy rail straightening, the horizontal straightening model of 60kg · m-1 heavy rail nine rollers was established by Pro / E and the finite element numerical simulation of heavy rail straightening process was carried out by ANSYS Workbench. The field straightening procedure was used to analyze and compare the residual stress of the heavy rail with the straightening speed and the assumed straightening speed. The results show that the straightening speed of the heavy rail is 1.4 ~ 1.6m · The s-1 range of rail-bottom straightening longitudinal residual tensile stress is less than 250MPa, and the residual stress distribution is reasonable, to meet the straightening requirements, compared with the field using the straightening speed of 1.2m · s-1, the production efficiency of the largest Can increase 16.7% ~ 33.3%.