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轨道动态几何形位直接对行车安全、轮轨作用力、车辆振动产生影响.轨道动态几何形位的变化与众多因素相关.轨道刚度变化同时影响着轮轨动荷载和轨道动态几何形位的变化.将沪宁线轨检车实测动态不平顺输入动力仿真软件,分别计算不同垂向和横向刚度时的轮轨动轮载和钢轨的垂向、横向动位移,并改变车辆速度和输入不平顺的大小,分析轨道不平顺、轮轨动荷载和钢轨动位移之间的关系.利用正态分布的原则统计不同状态下动轮载和动位移的最大值,分析对比钢轨动态变形和轮轨动荷载随刚度和速度的变化趋势,提出了合理的轨道刚度取值范围,并分析了初始不平顺大小对轨道动态位移的影响.
The orbital dynamic geometry directly affects the driving safety, wheel-rail force and vehicle vibration.The changes of the orbital dynamic geometry are related to many factors.The changes of the orbit stiffness also affect the dynamic load of the wheel-rail and the change of dynamic geometric shape The dynamic and irregular input dynamic simulation software for the railroad car surveyed on the Shanghai-Nanjing line was used to calculate the vertical and horizontal dynamic and dynamic wheel-rail and rail movements under different vertical and lateral stiffness and to change the vehicle speed and input irregularity Size, analysis of track irregularity, wheel-rail dynamic load and rail dynamic displacement.Using the principle of normal distribution statistics under different states of maximum dynamic wheel-load and dynamic displacement, analysis and comparison of rail dynamic deformation and wheel-rail dynamic load Stiffness and speed, a reasonable range of the orbital stiffness is proposed, and the influence of the initial irregularity on the dynamic displacement of the orbit is analyzed.