中文摘要：

热预弯冷却和复合矫直是百米重轨生产过程中最后两道连续变形的工艺环节,最终决定成品重轨的平直度、残余应力和断面尺寸。重轨复合矫直工艺随预弯冷却状态的变化而变化,为了深化对重轨生产过程中平直度、残余应力和断面尺寸的研究,在进行重轨复合矫直研究时,应将重轨预弯冷却后的模型（包括重轨冷却后的残余应力）作为矫直模型。本文采用隐显转换方法,将重轨冷却ANSYS隐式热分析求解的结果（重轨终冷时刻的几何模型和应力状态）完整地导入到重轨复合矫直ANSYS/LS-DYNA显式动力分析中,解决了复杂模型在多物理场连续求解中的耦合和分析模块的衔接问题,对工程中类似问题的求解具有广泛的借鉴意义。

英文摘要：

Hot preflex cooling and compound straightening is the last two consecutive deformation courses in hundred-meter heavy rail’s production, and finally inflect its straightness, residual stress and section sizes. For heavy rail compound straightening changing with the cooling status, and in order to studying on straightness, residual stress and section sizes, preflex cooling heavy rail model （including residual stress after cooling） should be taken as straightening model when studying on heavy rail compound straightening. The implicit-explicit conversion method is applied in leading-in the heavy rail cooling results by ANSYS implicit analysis （geometry model and stress state of the cold heavy rail） fully to straightening straight by ANSYS/LS-DYNA explicit analysis. And it solved the coupled problem between more continuous-solution physical field and the convergence in analysis module ,which with complex model, it also has widely of reference meaning in the similar problem of solution on engineering.