整体道床60 kg/m钢轨12号5 m间距交叉渡线道岔刚度均匀化探讨

摘要

This paper introduces the significance of stiffness homogenization for crossover turnout with integrated bed. Compared with single turnout, the structure of crossover turnout is more complicated. To identify the distribution rules of track rigidity of crossover turnout, a FEM calculation model for track rigidity of No. 12 crossover turnout with integrated bed and 5m Spacing Used in 60 kg /m Rail is established. Analytical results of distribution rules of track stiffness before stiffness homogenization show that stiffness irregularities exist laterally and longitudinally in the turnout. This paper addresses the principles and measures of crossover turnout stiffness homogenization, and puts forward the method to achieve it. After using relevant homogenization measurements, the integral stiffness beneath the straight and curve stock rails along track's longitudinal direction demonstrate linear relationship, which can meet the transport organization needs for station track and return track on high-speed lines and intercity lines.%介绍整体道床交叉渡线道岔刚度均匀化的研究意义。交叉渡线道岔和单开道岔相比结构更为复杂，为了研究其轨道刚度分布规律，以整体道床60 kg/m钢轨12号5 m间距交叉渡线道岔为例，建立交叉渡线道岔的轨道刚度有限元计算模型。通过计算分析得到刚度均匀化之前轨道刚度分布规律，表明道岔横向和纵向均存在较大的刚度不平顺。探讨刚度均匀化的原则和措施，提出交叉渡线道岔刚度均匀化的实现方法。刚度均匀化之后，直向和侧向过岔的轨道整体刚度沿线路纵向基本呈均匀分布，可以满足高速铁路和城际铁路在站线或折返线的运输组织需要。