重载列车纵向动力学仿真模型的有效性研究

Validity of Simulation Model of Heavy Haul Train Longitudinal Dynamics

针对重载列车纵向冲动问题,根据气体流动理论和机车动力制动特性,开发并完善了重载列车空气制动系统与纵向动力学联合同步仿真系统.对制动系统传动效率与机车电制动系统模型进行修正,细化了模型,提高了仿真系统精度.根据神华线路机车操纵控制指令,仿真列车编组为2+1时的停车与运行工况,将仿真结果与神华线路运行试验结果对比.计算结果表明:在空气制动停车与运行工况时,各车位列车管和制动缸压强试验与仿真结果基本一致;在停车与运行工况且施加机车制动电流的情况下,车钩力变化试验与仿真结果基本一致,最大车钩力试验与仿真误差在0.7%~14.2%之间,吻合程度较高.

Aiming at the longitudinal impulse of heavy haul train, a heavy haul train combined simulation model of air brake system and longitudinal dynamics was established and improved according to air flow theory and locomotive dynamic braking characteristics. The transmission efficiency of the air braking system and the locomotive electric braking system model were amended, the model was refined, and the simulation system precision was improved. Based on the control instructions of locomotive operation of Shenhua Line, the parking and operating braking condition of the locomotive marshalling mode which is 2+1 were simulated. The simulation results were compared with the experiment results of Shenhua Line operation. Calculation result shows that the experiment and simulation pressure curves of the train pipe and brake cylinder for each vehicle are basically consistent. In the conditions of the air braking on parking and operating with the application of locomotive braking current, the simulation changes of the coupler force are basically the same as the experiment ones. The maximal coupler force error between the experiment and simulation is 0.7- 14.2%, and the degree of anastomosis is higher.