转向架曲线轨道运行的蛇行模式和分岔特征  

Hunting Patterns and Bifurcation Characteristics of a Railway Bogie on Curved Track

作　　者：侍玉青 杨九河 罗冠炜 SHI Yuqing;YANG Jiuhe;LUO Guanwei(School of Mechatronic Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Gansu Provincial Key Laboratory of System Dynamics and Reliability of Rail Transport Equipment,Lanzhou 730070,China;Technology and Equipment of Rail Transit Operation and Maintenance Key Laboratory of Sichuan Province,Southwest Jiaotong University,Chengdu 610031,China;China Railway Chengdu Group Co.,Ltd.,Chengdu 610082,China)

机构地区：[1]兰州交通大学机电工程学院,甘肃兰州730070 [2]甘肃省轨道交通装备系统动力学与可靠性重点实验室,甘肃兰州730070 [3]西南交通大学轨道交通运维技术与装备四川省重点实验室,四川成都610031 [4]中国铁路成都局集团有限公司,四川成都610082

出　　处：《铁道学报》2024年第8期37-47,共11页Journal of the China Railway Society

基　　金：国家自然科学基金(12172157);甘肃省科技计划(20JR10RA232);轨道交通运维技术与装备四川省重点实验室开放研究课题(2020YW005)。

摘　　要：以曲线轨道运行的两轴转向架为研究对象,通过二维参数-变量分岔图,探讨其在非线性轮缘力作用下的蛇行模式和分岔特征。对比分析转向架系统在新轮期和磨耗期两种情况下的动力学特性,分析由磨耗引起的车轮踏面轮廓变化对转向架系统蛇行特性的影响。揭示蛇行模式和分岔特征与车轮踏面等效锥度的关联关系。确定参数敏感度及合理匹配范围,为铁路车辆悬挂参数的综合设计和最优组合提供理论依据。研究结果表明:导轮和后轮与轨道的冲击均始于轮缘与外轨的冲击,无论是新轮期还是磨耗期,后轮与内轨和外轨的冲击均滞后于导轮,且导轮对轨道的冲击强度大于后轮,磨耗期,这种现象更为显著。车轮踏面轮廓变化对周期1蛇行模式的失稳速度产生的影响较大,其失稳速度主要由周期倍化分岔和Neimark-Sacker分岔引起。Based on the case of a two-axle railway bogie running on a curved track,the hunting patterns and bifurcation characteristics of the bogie in the presence of the flange contact nonlinearity were discussed through the two-dimensional parameter variable bifurcation diagram.The dynamics and differences of the bogie system with unworn and worn wheelsets were compared to analyze the influence of wheel tread profile changes caused by wear on the hunting characteristics of the bogie system.By revealing the incidence relation between hunting patterns and bifurcation characteristics of the bogie system and its key parameters,the parameter sensitivity and reasonable matching range were determined,which provided a theoretical basis for the comprehensive design and optimal combination of railway vehicle suspension parameters.The results show that the impacts of the leading and trailing wheelsets on the rail begin with the impact of wheel flange on the outer rail.Regardless of the new wheel period or wear period,the impact of the trailing wheelsets on the inner and outer rails falls behind that of the leading wheelsets,while the impact strength of the leading wheelsets on the rail is greater than that of the trailing wheelsets,especially in the wear period.The changes in the wheel tread profile have a great influence on the instability speed of the period 1 hunting mode,which is mainly caused by period doubling bifurcation and Neimark-Sacker bifurcation.

关 键 词：两轴转向架 蛇行运动 分岔 参数域 

分 类 号：U260.331[机械工程—车辆工程] U270.11[交通运输工程—载运工具运用工程]