【作者】 孔光；

【导师】 张海燕；

【作者基本信息】 北京交通大学 ， 道路与铁道工程， 2007， 硕士

【摘要】 本文给出了路涵过渡段的定义，指出了现行路涵过渡段中存在的问题，并较为系统的总结了国内外车辆一轨道耦合动力学的研究概况以及过渡段的处理方案。 从系统动力学的角度出发，根据车辆轨道耦合动力学建模的一般原则和简化计算的假设，建立了有碴轨道车辆一轨道垂向耦合动力学分析模型，其中包括车辆模型、钢轨模型、轨枕一道床模型以及轮轨耦合关系模型。并且自行编制了仿真计算程序，采用新型显示积分法对系统耦合振动微分方程进行求解。 介绍了国内外常用的轨道不平顺数值模拟方法的模拟原理和步骤，采用计算机仿真程序模拟出三角级数法生成的美国六级轨道不平顺谱时域样本，并以此作为车辆一轨道垂向动力学模型的输入激励，通过数值仿真得出系统的时间响应历程。 利用车辆一轨道耦合动力学系统模型及计算仿真程序，考虑既有线路涵过渡段的实际情况，确定了路涵过渡段问题的计算条件和分析内容，对不同运行工况下的路涵过渡段进行动力响应分析，得出了各工况下车辆、轨道动力性能的各种动力效应。更多还原

【Abstract】 At first, the road-culvert transition section is defined and the associated road-culvert transition section problems are presented. The worldwide present situation of study of vehicle-track coupling dynamics and the construction technology plan of uniformity stiffness on transition section is summarized.According to the general principles of forming model of vehicle-track coupling system and the assumption of simplifying calculate, the model of coupling vibration of vehicle and ballast aggregate track is established. It includes models of the train, rail, sleeper-roadbed and wheel/rail contact. The simulation calculation procedure is prepared. A new explicit integration method is used to working out the differential equation of coup- ling vibration system.The principles and steps of the methods were introduced, the sixth grade track ire-gularity PSD of U.S. railway samples in time domain were achieved by simulating trigonometric series respectively, the samples were taken as the inputting disturbances of a vehicle-track vertical dynamics model, the time response courses of vehicle system we- re obtained by numerical simulation.Using this model and the computational procedure, the required compute contents and conditions are given in light of the situation of the track transition. The dynamic responses of the track and the vehicle on track transition are obtained under different work conditions.更多还原