从列车纵向运动研究重载线路纵断面连接标准

STUDY ON THE STANDARDS FOR CONNECTING ADJACENT GRADES OF RAILWAY LINES THR0UGH LONGITUDINAL MOVEMENTS OF TRAINS

本文假设列车是由非完全弹性元件连接多个刚体组成的离散质量系统,采用列车纵向非稳态运动动态模型,由电子计算机模拟列车以不同工况通过线路变坡处的纵向运动。着重研究单编5000t重载列车非稳态运动下的纵向力的大小以及机车牵引力、运行工况、列车重量和线路纵断面组合等因素对纵向力的影响规律。据此,提出了保证列车运行不断钩的纵断面连接标准的建议和重载列车安全操纵的一些原则。

In this paper, with the adoption of the dynamic model for the unstable-state longitudinal movements of trains and the assumption that thetrain is a discrete mass system consisting of numerous rigid bodies coupledby partially elastic elements, the longitudinal movements of trainspassing through the points of gradient change of raiIway Iines underferent operating modes are simulated by electronic computers. Emphasis islaid upon the study on the magnitude of the longitudinal force produced bythe 5 000t single-engine unit heavy-haul trains uder unstable-state movements,and on of the influence of locomotive tractive force, operating mode,train weight and various elements of the rail line profile upon thislongitudinal force. On this basis, proposals are made concerning thestandards for connecting the adjacent grades of railways with the conditionthot the couplers will not be broken during train operation, along with thepresentation of some principles for the safe operation of heavy-haultrains.