ECP信号传播方式对3万t重载列车制动工况纵向冲动影响仿真研究

Simulation Study on Influence of ECP Signal Propagation Mode on Longitudinal Impulse of 30 000 t Heavy-haul Train under Braking Condition

3万t重载列车是目前国内重载运输行业的重点研究对象,ECP方式是降低重载列车车钩力的重要手段。文章针对3万t重载列车,采用仿真方法研究了ECP电控信号传播方式的传播特性、列车制动能力和纵向冲动水平。研究表明,在3种ECP电控信号传播方式下,列车电控装置动作时间差为2.66~3.97 s,列车中制动缸活塞伸出时间差为2.80~3.80 s, 3种方式下列车制动能力差异不大,制动过程中产生车钩力最小的ECP传播方式为主控机车发送ECP信号的同时从控机车向前后发送ECP信号,紧急制动时最大车钩力为-1 565 kN。通过探究ECP信号传播方式对3万t重载列车制动工况纵向冲动的影响,可为3万t列车电空制动方案设计提供参考。

The 30000 t heavy-haul train is a key research object of the domestic heavy-haul transportation industry at present,and the ECP mode is an important means to reduce the coupler force of the heavy-haul train.Taking the 30000 t heavy-haul train as the research object,the brake propagation characteristics,train braking capacity and longitudinal impulse level of three ECP signal propagation modes are studied by simulation method.The results show that under the three propagation modes of ECP electric control signal,the action time difference of train electric control device is 2.66~3.97 s,and the extension time difference of the brake cylinder piston between the first and last vehicle is 2.80~3.80 s.There is little difference in the train braking capacity of the three ECP signal propagation modes.During braking,the ECP propagation mode that produces the minimum coupler force sends the ECP signal for the master control locomotive while the slave control locomotive sends the ECP signal forward and backward.The maximum coupler force during emergency braking is-1565 kN.By studying the effect of ECP signal propagation mode on the longitudinal impulse under braking conditions of 30000 t heavy-haul trains,the paper provides a reference for the design of the electro-pneumatic braking scheme of 30000 t heavy-haul trains.