摘要
重载组合列车因其整体重量大,制动时会产生较大的纵向车钩力,而纵向车钩力大小是最能直观反映列车纵向冲动大小的因素。重载组合列车采用分布动力模式,在制动时只能通过机车施加空气制动指令。受列车管压力波速传递作用影响,列车的前后车辆存在制动不同步性,位于列车中部的重联机车纵向力作用更为复杂,严重时会影响重载组合列车的运行安全。通过建立重载组合列车的纵向动力学仿真模型,考虑空气制动时车辆间制动不同步性产生的附加扰动影响,仿真分析不同制动工况下重载组合列车的纵向力变化及变异现象。结合制动模式特性,通过调整空气制动和机车再生制动控制机制,特别是本务机车和重联机车制动力差值变化,提出适时异步匹配空气制动力和机车再生制动力的控制策略。仿真结果表明,适时异步匹配机车再生制动及空气制动可以有效减小组合列车整体纵向车钩力,重联机车的再生制动力异步匹配本务机车时,可以有效缓解长大下坡道及变坡道制动时重联机车的前堵后涌现象,降低列车纵向车钩力,可为重载组合列车优化制动策略提供参考。
The heavy-haul combined trains generate a large longitudinal coupler force upon braking due to its large total weight,and the longitudinal coupler force is the most intuitive factor to reflect the longitudinal impulse of the train.The heavy-haul combined train adopts the distributed power mode,and can only apply the air brake command through the locomotive upon braking.Affected by the transmission of pressure wave velocity in the train tube,the front and rear vehicles of the train have braking asynchrony,and the longitudinal force of the heavy-haul combined train located in the middle of the train is more complicated.This would affect the operation safety of the heavy-haul combined train in severe cases.In this paper,the longitudinal dynamics simulation model of the heavy-haul combined train was established,and the additional disturbances caused by the braking asynchrony between vehicles during air braking were considered.The longitudinal force change and variation phenomenon of the heavy-haul combined train under different braking conditions were simulated and analyzed.Combining with the characteristics of the braking mode,a control strategy of timely and asynchronously matching air braking force and locomotive regenerative braking force was proposed by adjusting the air brake and locomotive regenerative braking control mechanism,especially the change of the braking force difference between the main locomotive and the heavy-line locomotive.The simulation results show that the timely and asynchronous matching of the regenerative braking and air braking of the locomotive can effectively reduce the overall longitudinal coupler force of the combined train.When the regenerative braking force of the re-connected locomotive matches the local locomotive asynchronously,it can effectively alleviate the front and back jams of the re-connected locomotive during braking on long downhill or variable ramp,reduce the longitudinal coupler force of the train,and provide reference for optimizing the braking strategy of the heavy-d
作者
李蔚
姚美琪
张勐轶
张文璐
于永生
吴建华
LI Wei;YAO Meiqi;ZHANG Mengyi;ZHANG Wenlu;YU Yongsheng;WU Jianhua(School of Traffic&Transportation Engineering,Central South University,Changsha 410075,China;China Railway Taiyuan Group Co.,Ltd.,Taiyuan 030013,China;Institute of Science and Technology,Limited by Share Ltd.,the Datong-Qinhuangdao Railway,Taiyuan 030013,China)
出处
《铁道科学与工程学报》
EI
CAS
CSCD
北大核心
2023年第2期694-705,共12页
Journal of Railway Science and Engineering
基金
湖南省自然科学基金资助项目(2021JJ30828)。
关键词
重载组合列车
纵向动力学
联合制动匹配
机车再生制动力
车钩力
heavy-haul combined train
longitudinal dynamics
blend brake matching
locomotive regenerative braking force
coupler force
