列车提速对线路的动力影响研究与对策

Dynamic Effects of Speed-raise Train on Track and the Countermeasures

列车提速是我国铁路实施的具有战略意义的重大决策。由于提速是在既有线上进行的 ,提速后机车车辆对线路结构的动力影响将不可避免地增强 ,给轨道结构强度和线路日常养护维修工作带来不利影响。文中运用车辆 -轨道耦合动力学理论 ,对提速线路上较为突出的几个动力问题——提速道岔、钢轨焊缝、路桥连接处的动力问题 ,以及车轮擦伤对线路的动力影响等 ,进行了较细致的分析研究 ,在此基础上提出了解决这些问题的基本对策。

It is a significant decision for the Chinese railway to enhance train speed on existing lines.The dynamic effects of trains on track structures will be unavoidablly increased with train speed.In the paper,the theory of vehicle track coupling dynamics is employed to analyze some severe dynamic problems located in turnouts,welded rail joints,and in bridge subgrade connection on the speed raise lines.Some basic countermeasures are proposed to solve these problems,based on the dynamic analysis.