用荷载增量法求解无缝线路的稳定性

Calculating the Stability of Jointless Tracks with Load Increment Method

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，其计算结果与统一公式的计算结果能较好吻合。

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 assumpted as a series of springs and the lateral resistance forces of ballast bed acted on the sleepers are treated as nonlinear functions related to the displacements. With the load increment method, the stability of jointless tracks is calculated. The results are close to the calculated results of the universal formulation.