空车编组数量对货物列车安全性影响研究
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华东交通大学

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U271.92

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江西省教育厅科技项目 (GJJ170358、GJJ180291),国家自然科学基金资助项目(51665015)。


Analysis of the Influence of the Number of Empty Vehicles on the Safety of Freight Trains
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East China Jiaotong University

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    摘要:

    在既有线货物列车提速和重载的背景下,为了研究空车编组数量对货物列车运行安全性的影响,根据车辆系统动力学理论、列车纵向动力学理论、车辆-轨道耦合动力学理论,采用数值方法建立了空重车混编列车-轨道耦合系统动力学模型,分析了制动工况下不同数量空车编组在货物列车头、尾部时,货物列车的轮轴横向力、脱轨系数、轮重减载率等安全性指标变化情况,结果表明:当列车头部(机车后部)和尾部各编组5、10、20辆空车时,制动工况下,空车及重车的轮轴横向力、脱轨系数、轮重减载率均满足GB/T 5599-2019《机车车辆动力学性能评定及试验鉴定规范》标准要求,且有一定安全裕量;列车中空车的轮轴横向力和轮轨横向力均小于重车,空车的脱轨系数和轮重减载率大于重车;当列车头、尾部各编组5辆空车时,空车及重车的轮轴横向力均最小,而其他两种编情况下横向轮轴力相差不大;对于脱轨系数和轮重减载率,除尾部编组5辆空车的情况外,编组在头部的空车的脱轨系数和轮重减载率均大于尾部空车,在列车头部和尾部各编组10辆、20辆空车时两列车整体轮重减载率差异较小。

    Abstract:

    In order to analyze the effect of the number of empty trains on the safety of freight trains, a dynamic model of the Train-Track coupling system with empty vehicles and heavy vehicles was established based on the theory of vehicle system dynamics, train longitudinal dynamics theory and the theory of Vehicle-Track coupling dynamics. Based on this, the lateral wheelset force, the derailment coefficient, the wheel unloading rate was analyzed when different numbers of empty vehicles were located in the head and rear parts of the freight train while braking. The results show that when 5, 10, and 20 empty vehicles were marshalling at the head and tail of the train, the lateral wheelset force, the derailment coefficient, the wheel unloading rate of the empty and heavy vehicles all meet the standard requirements of the GB/T 5599-2019 standard and have a certain safety margin. When the empty and heavy vehicles mixed marshalling train braking on curve railway, the lateral wheelset force of the empty vehicle is less than that of the heavy vehicle, and the derailment coefficient and wheel unloading rate of the empty vehicle are greater than that of the heavy vehicle. When 5 empty vehicles were located at the head and tail of the train, the lateral wheelset force of the empty vehicle and the heavy vehicle are all the smallest, but the wheel unloading rate of the empty vehicle at the tail is the largest at the same time. For the derailment coefficient and wheel unloading rate, except for the case of only 5 empty vehicles located in the head and rear marshalling, the derailment coefficient and wheel unloading rate of the empty vehicles marshalling at the head of the train are larger than those of the tail empty vehicles. When the head and tail of the train are marshalling of 10 and 20 empty vehicles respectively, the difference in the overall wheel load reduction rate of the two trains is small.

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  • 收稿日期:2020-09-29
  • 最后修改日期:2020-10-20
  • 录用日期:2020-11-19
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