道岔用复合定位套优化改进

摘要

Aiming at the fatigue failure of the existing composite locating sleeve under trains loads, in this paper, its structures are optimized and the calculation models of composite locating sleeve are established based on the theory of FEM( finite element method) and track dynamics. In the calculation model, the friction coefficient and the twisting moment of bolts in turnout sleepers are taken into account. The finite element method is used to study the stress of the composite locating sleeve. The results indicate that the composite locating sleeve optimized can meet the requirements of actual motion of trains, while the friction coefficient and twisting moment of bolts in turnout sleepers has little effects on the stress of the composite locating sleeve.%针对既有的复合定位套在列车荷栽作用下发生疲劳破损的情况,优化其结构,同时运用有限元法和轨道动力学理论建立复合定位套计算模型,考虑了摩擦系数、岔枕螺栓扭矩的影响因素,对模型的应力进行计算.结果表明:优化后的复合定位套可满足列车实际运行需求,而摩擦系数与岔枕螺栓扭矩对复合定位套的应力影响很小.