随着我国铁路客运和高速铁路的兴建,有线提速和城市轨道的发展,区间和跨区无缝线路已经成为轨道结构的主要形式。桥上无缝线路梁轨相互作用是轨道工程的关键技术。本文以梁轨相互作用原理为基础,建立了纵向附加力计算有限元模型,并与纵向附加力微分方程求解法、广义变分原理以及有限单元法计算进行结果比较,表明采用的有限元计算是合理的。 With the construction of China’s railway passenger transport and high-speed railway, the speed-up of wired and the development of urban railways, the interval and cross-regional seamless routes have become the main form of orbital structure. The interaction between beams and rails on the bridge is a key technology of orbital engineering. In this paper, based on the principle of beam-rail interaction, the finite element model of longitudinal additive force was established and compared with the solution of longitudinal additive force differential equation, generalized variational principle and finite element method. The results show that the finite element method reasonable.