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根据气体流动理论与多刚体动力学原理,建立了带有列尾装置的列车空气制动系统与列车纵向动力学联合仿真模型,计算了制动系统中空气流动瞬态数值解,获得制动系统特性,同步计算了列车纵向冲动。2万吨组合列车计算结果表明:全制动时安装列尾装置使最大车钩力降低54%,列车纵向冲动明显降低;列尾装置减压量越大,车钩力降低越明显,目前列尾装置减压量固定为50kPa,应根据线路经常使用的减压量确定更合理的值;列尾装置排气速度对车钩力影响较小;列尾装置滞后时间对车钩力影响微小;使用机车替代列尾装置,在大减压量制动时,车钩力将明显得到改善,减压量越小,机车与列尾装置作用效果越接近,当机车减压50kPa制动时,列尾装置与机车作用相同。
According to the theory of gas flow and multi-body dynamics, the co-simulation model of train air braking system and train longitudinal dynamics with train tail is set up, the transient numerical solution of air flow in braking system is calculated, and the braking system Characteristics, synchronous calculation of the train longitudinal impulse. The results of the calculation of 20000-ton hybrid train indicate that when the whole train is installed, the tail-end installation reduces the maximum hook-up force by 54% and the longitudinal impulse of the train decreases obviously. The greater the pressure reduction of the tail-end device is, Decompression rate is fixed at 50kPa, the line should be based on the amount of pressure reduction often used to determine a more reasonable value; exhaust tail column exhaust speed has little effect on the hook; column tail hysteresis device on the hook force little influence; Tail device, the brake at a large reduction pressure, the hook force will be significantly improved, the smaller the amount of pressure reduction, locomotives and tail tail device effect closer to when the locomotive decompression 50kPa brake, the tail of the device and the role of locomotive the same.