列车管减压量对重载列车纵向动力学性能的影响

The Influence of Train Pipe Pressure Reduction on the Longitudinal Dynamics Performance of Heavy-haul Train

基于列车纵向动力学理论,充分考虑列车的空气制动与动力制动特性,建立了重载列车纵向动力学模型。以2台SS4B型电力机车牵引万吨重载列车为例,仿真分析了空电联合制动工况下列车管减压量对列车纵向动力学性能的影响。结果表明:列车降速距离与降速时间均随列车管减压量的增大而减小,而列车增速距离与增速时间则随列车管减压量的增大而增大;列车管减压量对列车最大拉钩力的影响不明显,而列车最大压钩力则随列车管减压量的增大而显著增大,当列车管减压量从50k Pa增加至70k Pa时,最大拉钩力仅减小了5.9%;而最大压钩力则增加了20.1%。

Based on the theory of train longitudinal dynamics, a dynamic model of heavy-haul train is presented. The characteristics of air braking system and dynamic braking system are considered. Taking a 10,000t heavy-haul train which is pulled by double SS4B locomotives as an engineering example, the influences of train pipe pressure reduction on longitudinal dynamic performance under condition of electric-pneumatic blend braking are analyzed. Results indicate that, both the deceleration distance and deceleration time decrease with the increase of train pipe pressure reduction, while at the same time the acceleration distance and acceleration time increase. The influence of train pipe pressure reduction on the maximum stretched force can be neglected. With the increase of train pipe pressure reduction, the compressed force increases significantly. If the train pipe pressure reduction increases from 50kPa to 70kpa, the maximum stretched force will be decreased by 5.9%, while the maximum compressed force will be increased by 20.1%.