重载列车长大下坡纵向力与空气制动性能分析
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关键词：重载列车；长大下坡；纵向力；空气制动中图分类号：0436 文献标志码：ADOI:10.19968/j.cnki.hnkj.1003-5168.2025.14.001文章编号：1003-5168（2025)14-0005-08
Analysis ofLongitudinal Force and Air Braking Performance of Heavy-Haul TrainsonLongDownhill Grades
WANG Jiong (Guoneng Transportation Technology Research Institute Co.,Ltd.,Beijing 1Ooo8o, China)
Abstract: [Purposes] Whena heavy-haul train operates on a long downhill grade,repeated cyclic braking operations cause the brake pads to heat up,leading to degradation in air braking performance.Furthermore,significant variations exist inthe air braking force generated bythe same trainat different braking stages and between diffrent trains.To ensure operational safety and reduce driver workload,it is essential to conduct research on the evaluation of air braking performance.[Methods] Collct data on the train control force,cumulative braking and release time of air braking,train running speed,line parameters,and maximum longitudinal force during the operation of heavy-haul trains to form a sample dataset.Use BP neural network training to establish an analytical method for evaluating the longitudinal force of heavy-haul trains.[Findings] Several typical air braking curves from real vehicle data were simulated andanalyzed to verify the applicability of the S-shaped air braking force model,thereby achieving the prediction and evaluation of the maximum coupler compression and tension forces of the entire train during single-step operation of heavy-haul trains.[Conclusions] By analyzing the influence of air pressure distribution at the rear of the train on air braking performance,the air braking performance is categorized into four levels,and evaluation criteria for air braking performance are formulated.Corresponding operational recommendations are also provided,offring technical support for air cyclic braking of heavy-haul trains on long downhill sections and guiding drivers toward safer operation. Keywords: heavy-haul train; long downhill; longitudinal force; air braking
0 引言
1空气制动力计算方法
朔黄铁路是国家能源集团重载铁路唯一人海运输通道，承载着我国“西煤东送”战略的重要使命。（剩余12585字）