The rail, sleeper and beam have distinct relative displacement. In the former mechanics model, the influence of the displacement of the sleeper is not taken into account.
以往对钢轨、轨枕及梁跨结构三者之间产生相对位移的计算模型，没有考虑轨枕位移的影响。
2
Sleeper is regarded as a finite long beam on continuous elastics base. The relation between rail forces and sleeper displacement is established by analysis of sleeper forces.
将轨枕视为连续弹性基础上的有限长梁，对轨枕进行了受力分析，建立了钢轨轴向力和轨枕变形曲线的关系。
3
By running the program based on vehicle-rail coupling dynamics, compute the dynamic response of elastic sleeper ballasted rail and common sleeper ballasted rail under same working condition.