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依据系统工程理论的思想,基于车辆—轨道耦合动力学理论和有限元理论,建立机车车辆和板式无砟轨道结构的力学模型,采用ABAQUS软件实现滚动接触过程的轮轨接触的模拟,对铁路客运专线土质路基板式无砟轨道结构在高速行车条件下的动力学性能进行仿真分析研究。结果表明:板式无砟轨道结构的平顺性很好;动车组轮轨垂向力、轮重减载率、轮轨垂向力动载系数和各轮脱轨系数的最大值及其离散性均随着列车速度的提高而增大,整个动车组所有车轮的轮轨横向力最大值以及各轴的轮轴横向力均远小于安全控制值;板式无砟轨道结构各部分的振动加速度和主要振动频带范围随着列车速度的增大而增大;板式无砟轨道结构的振动衰减情况良好。
According to the theory of system engineering, based on the theory of vehicle-rail coupling dynamics and finite element method, the mechanical model of rolling stock and slab ballastless track structure is established. The wheel-rail contact simulation of rolling contact process is realized by ABAQUS software, Dynamic Analysis of Dynamic Behavior of Subgrade Subgrade Ballastless Track under High Speed Driving Conditions. The results show that the smoothness of the slab ballastless track structure is very good. The maximum value of wheel-rail vertical load, wheel load and unloading rate, dynamic wheel-rail load coefficient and each wheel derailment coefficient and its dispersion are With the increase of the train speed, the maximum value of the wheel-rail lateral force and the axle lateral force of all the axles of the whole EMU are far less than the safety control values. The vibration acceleration and the main vibration frequency band of each part of the slab-type ballastless track structure As the train speed increases, the vibration attenuation of the slab ballastless track structure is good.