摘要
为了研究列车变坡点地段的车钩力分布规律,减少铁道车辆在变坡点地段的断钩事故,制定变坡点地段平稳操纵方案。采用多质点建模理论对西康线上某次货运列车进行纵向动力学建模,仿真分析列车牵引力、电制力、坡道阻力并对4种典型变坡点地段的车钩力变化规律展开研究。仿真与试验结果对比表明:所建立的模型能够再现列车牵引力、电制动力和坡道阻力;上坡道变坡点地段,在上坡前提前增大牵引手柄级位能防止因位能变化而引起的纵向冲动;下坡道变坡点地段,在列车部分进入下坡道时进行牵引工况到惰行工况的转换能避免因牵引力卸载而引起的纵向冲动;鱼背式变坡点地段,在列车全部进入上坡道后进行惰行工况到牵引工况的转换能最大程度减小车钩力变化率;锅底式变坡点地段,在列车全部进入上坡道后进行惰行工况到牵引工况的转换能最大程度减小车钩力变化率。
To study the distribution law of coupler force in the section with variable slope and reduce the coupler breaking accident of railway vehicles in the section with variable slope,a stable operation scheme was developed.The longitudinal dynamics model of a freight train on Xikang Line was established by using the multi particle modeling theory.The traction force,electric braking force,and slope resistance of the train were simulated and analyzed.The variations of coupler force in four typical slope changing scenarios were studied.The comparison of simulation and experimental results shows that the model established can reproduce the train traction force,electric braking force,and slope resistance.For the section with changing slope point on the uphill,increasing the traction handle level in advance before uphill can prevent the longitudinal impulse caused by potential energy change.When partial train enters the downhill,the longitudinal impulse caused by the unloading of traction force can be avoided by changing traction mode to idle mode when the train enters the downhill.For the convex type slope changing point section,the change rate of trolley hook force can be reduced to the greatest extent by shifting idle mode to traction mode after all the trains enter the uphill.In the concave slope changing point section,the change rate of trolley hook force can be reduced to the greatest extent by shifting idle mode to traction mode after the whole train enters the ramp.
作者
池长欣
梁树林
池茂儒
高红星
宁侨
CHI Chang-xin;LIANG Shu-lin;CHI Mao-ru;GAO Hong-xing;NING Qiao(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China;Zhuzhou CRRC Times Electric Co.,Ltd.,Qingdao 266111,China)
出处
《科学技术与工程》
北大核心
2021年第8期3325-3332,共8页
Science Technology and Engineering
基金
国家科技计划项目(国际科技合作项目)(KY201701001)
国家重点研发计划(2018YFB1201701)。
关键词
变坡地段
多质点模型
车钩力
平稳操纵
工况转换
variable slope
multiple points model
coupler force
smooth operation
working mode shifting
