论文部分内容阅读
依据系统工程理论,建立高速铁路曲线线路车线耦合系统有限元模型,对曲线线路在高速行车条件下的耦合系统动力学性能进行仿真,研究时速300 km等级高速动车组作用下曲线线路安全与平稳性指标,曲线线路轨道结构各部分的振动响应、列车速度与曲线半径和超高的关系。结果表明:动车组以350 km.h-1的速度通过半径为5 500,7 000和9 000 m的曲线线路时,动车组的垂向和横向振动加速度以及平稳性能均满足舒适度要求,而且脱轨系数和轮轴横向力也能满足列车运行安全性要求;钢轨支点的横向力表现为过超高时内轨侧大、外轨侧小,欠超高时外轨侧大、内轨侧小;钢轨、轨枕的垂向和横向加速度随速度增加明显增大,而道床和路基的垂向加速度变化不大;钢轨和轨枕的横向动位移和动态轨距扩大量随速度的增加而增大;相同速度下,曲线半径小的轨道振动相对较大。
According to the theory of system engineering, the finite element model of the coupling system of curved line of high speed railway is established, the dynamic performance of the coupled system of curved line under high speed driving condition is simulated, and the safety and stability of curved line under the action of 300 km / h Sexual indicators, the vibration response of each part of the curved track structure, the relationship between train speed and curve radius and super high. The results show that the vertical and lateral vibration acceleration and stationary performance of the EMUs meet the comfort requirements when the EMUs pass through the curves of 5 500, 7 000 and 9 000 m with a speed of 350 km · h -1 The derailment coefficient and axle transverse force can also meet the requirements of train operation safety. The lateral force of rail fulcrum shows that when the rail lateral force is too high, the inner rail side is large, the outer rail side is small, the outer rail side is large, the inner rail side is small, The vertical and lateral accelerations of sleeper increased with the increase of velocity, while the vertical acceleration of ballast bed and subgrade changed little. The lateral dynamic displacement and dynamic gauge expansion of rail and sleeper increased with the increase of velocity. The same velocity Under the small curve radius of the orbit vibration is relatively large.