大型养路机械维修无缝线路稳定性的研究

Study on stability of jiontless track by using large maintenance-of-way machines

大型养路机械维修无缝线路会使轨道的稳定性下降 ,本文应用有限元法 ,将轨道视为具有一定横向刚度的有限长梁 ,并具有一定的初始弯曲 ,钢轨和轨枕的连接为一系列弹簧 ,轨枕在道床上的阻力是随位移变化的非线性函数 ,采用荷载增量法迭代求解无缝线路的稳定性。

In general, by using the large maintenance of way machines to maintain jointless tracks will result in the reduction of the stability of the tracks. In this paper, the rails are considered as beams with finite lengths where there are certain transversal rigidity and initial bent,the joints of rails and sleepers are assumed as a series of springs, and the lateral resistance forces of ballast bed acted on the sleepers are treated as a nonlinear function related to the displacements. With the load increment method, the stability of jointless tracks is calculated.Thus, we can supervise and predict the stability of maintained tracks according to the tested lateral resistance of ballast.