京沪线万吨列车主辅机最佳时间差仿真研究

Optimazition Reaseach of Two Locomotive Action Time Difference for Beijing-Shanghai Line Heavy Haul Train

随着京沪客运专线的建立,客货运输分线,提升货运能力已成为一个亟待解决的问题。使用大功率机车牵引万吨单编列车可以提高运能,但京沪线现有站台长度不能满足长大列车的停车要求,组合重载是提高运能的可能方式,多列车连挂运输使得列车的纵向冲动增加。本文以京沪线万吨组合列车(由两列5 000t的单编列车组成)为研究模型,计算分析了多种减压量制动和制动后缓解以及紧急制动车钩力分布规律。在此基础上分析了主从机车不同步时间对车钩力影响规律,并寻找到常用制动时,制动缓解时,从控机车提前于主控机车4s动作时车钩力较小;紧急制动时,从控机车提前于主控机车1s动作车钩力较合适。主从机车不同步动作对制动距离影响较小。

With the building of Beijing-Shanghai passenger high speed line, the separate of freight and passenger and how to enhance the cargo capacity has become a very important question which urgently awaits to be solved at present. 10000 tons of single-series trains with high-power locomotives can increase the transport capacity, but the existing platform of Beijing-Shanghai line can not meet the length for the train parking requirements, the connected train is a possible way to improve the transport capacity. Longitudinal impulse will increase because of the connected train. This article uses the 10000 tons connected train（made up by two 5000 tons of single-series trains） as model, and analyzed the coupler force distribution of different amount of brake pipe reduction in brake service application, e- mergency and release. Basing on this the influence of asynchronous instructions （the master locomotive to the slave locomotive） on the coupler force distribution is analyzed. It is found there will be a smaller coupler force if the slave locomotive acts four seconds ahead of the master locomotive in common brake and release conditions, one second in emergency condition. The asynchronization of masterslave locomotives has little impact on braking distance.