中文摘要：

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。

英文摘要：

Based on the thought of the system engineering theory, the theory of vehicle-track coupling dynamics and the finite element method, the dynamics models of vehicle structure and ballastless track structure have been set up separately. By adopting ABAQUS software, the calculation about rail/wheel interaction has been realized and simulation research on the dynamics characteristics of ballastless track structure of passenger traffic railway under the high vehicle velocity on soil subgrade has been carried out. The simulated results show that ballastless track structure has good smoothness. The vertical force which caused by the interaction of wheel and rail, the rate of wheel load reduction, the coefficient of wheel/rail vertical dynamic force, the maximum derailment coefficient and its dispersion of each structure part are all enlarged with the increase of the vehicle speed. The maximum wheel-rail lateral force and axle lateral force are all much lower than their safety limits. The vibration acceleration and the main vibration frequency ranges of all the parts in the slab ballastless track structure are enlarged with the increase of the vehicle speed. The slab ballastless track structure has good vibration attenuation regularity in view of the vibration transfer curve.