2万吨重载组合列车制动操纵对纵向冲动的影响研究

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中图分类号：U270.1 文献标志码：A文章编号：1006-0316（2026）02-0039-08

doi：0.3969/j.issn.006-036.2026.02.006

Influence of Braking Operation on Longitudinal Impulse of 20，000-TonHeavy-Haul Combined Train

WANG Jianhua’， JIN Yang²，RAN Xiangrui² （.Locomotive and Rolling Stock Division， Guoneng Shuohuang Railway Development Co.， Ltd.， Cangzhou O62350， China; 2. State Key Laboratory of Rail Transit Vehicle System， Southwest Jiaotong University， Chengdu 610031， China）

Abstract ∵ Aiming at the longitudinal impulse problem of 20，oo0-ton heavy-haul combined trains，this paper establishes a multi-particle longitudinal dynamic model of heavy-haul train considering locomotive traction， braking characteristics and nonlinear coupler bufer system.Combined with theoretical analysis and numerical simulation，the influenceof three keycontrol factors，namely，the proportionof electric braking，the positionof braking and the position of relieving，on the longitudinal impulse of heavy-haul train underthe running condition of 10‰ long downhill is systematically revealed.The results show that reducing the maximum electric braking ratio ofthe locomotive can significantly reduce the maximum hook pressing force of the train during the braking process.When the electric braking ratio is0.8，the maximum hook pulling forceof the train is the smallest.Reasonable selection of brakingand relieving position can effectively improve the longitudinal force distribution of the train.The closer the train air braking and relieving position，the smaler the longitudinal impulse.The research resultscan provide an important theoretical basis for the braking control mode and longitudinal impulse active suppression ofheavy-haul trains.

Key words：heavy-haul trains;brake control;long downhillramp;longitudinal impulse

在我国大秦线、朔黄线等主要重载线路运营中，2万吨及以上重载组合列车已常态化开行，重载运输技术持续突破[1]。（剩余5875字）