大轴重重载列车长大下坡道曲线地段行车性能分析

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摘要重载铁路长大下坡道小曲线地段病害多发，是危及行车安全的风险源。本文以双机牵引30t轴重万吨列车为研究对象，在考虑列车纵向冲动和曲线车辆动力学行为基础上，建立了长大列车动力学模型，分析了大轴重重载列车在常用全制动工况下长大坡道曲线参数设置对行车性能的影响。研究表明：重载列车在13‰下坡道500m 半径曲线地段制动时，整列车产生最大压钩力的车辆与曲线上出现最大车钩力的车辆并不一致，当曲线距头车初始制动位置距离700m时，曲线段上第48节车车钩力达到最大值；制动产生的纵向冲动作用可使轮重减载率增大72%、倾覆系数增大47%、轮轨横向力增大41%、脱轨系数增大27%，这一作用会对行车安全性和轨道服役性能造成不利影响；从提高运营期行车安全、减缓曲线病害角度考虑，建议长大坡度最小曲线半径选取800m。本文研究可为重载铁路设计提供参考。

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关键词 ：重载列车, 纵向动力学, 长大下坡, 曲线, 行车性能

Abstract：

The diseases of heavy haul railway happen easily on the long steep downgrade and this is a risk source which endangers the traffic safety. 30t axle-load 10,000t heavy haul train tracked by two locomotives was studied and long train dynamics model was established based on the train longitudinal impulse and vehicle dynamics on the curve. The influence of curve parameters on train operation performance was analyzed when heavy haul train was passing curve on the long steep downgrade under the service braking conditions. The results show that the maximum compression coupler force of the whole train is not consistent with the maximum coupler force of the vehicle on the curve when the heavy train was braked and passing curve on the -13‰ gradient. Coupler force of the forty-eighth vehicle on the curve can reach the maximum when the curve is away from the head car 700m. The longitudinal impulse created by braking can increase the wheel load reduction rate by 72%, the wheel-rail lateral forces by 41% and the derailment coefficient by 27%. This will affect the safety of train operation and performance of the rail service. 800m is suggested to be the minimum curve radius of the long steep downgrade considering the improvement of the operation safety and slowing down the diseases of the curve. The research can provide reference for the design of heavy haul railway.

Key words： heavy haul train longitudinal dynamics long steep downgrade curve train operation performance

收稿日期: 2015-12-31 出版日期: 2017-07-28

引用本文:

蒋立干 1，时瑾 1,2，龙许友 3. 大轴重重载列车长大下坡道曲线地段行车性能分析[J]. 振动与冲击, 2017, 36(15): 77-83.
JIANG Li-gan 1 SHI Jin1, 2 Long Xu-you3. Analysis of train performance of heavy haul train passing curve on the long-steep ramp. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(15): 77-83.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2017/V36/I15/77

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