摘要
基于车辆-轨道耦合动力学理论,建立了考虑不同轮轨黏着状态的地铁车辆-轨道耦合动力学模型,分析了轮轨界面黏着状态和曲线半径对轮轨系统动态相互作用的影响。结果表明:车辆通过曲线区段时,轮轨界面黏着状态对轮对运动姿态和轮轨系统动态相互作用的影响显著;轮轨界面存在低黏着接触状态会削弱轮对导向能力,致使脱轨系数增大,尤其当外侧轮轨界面存在低黏着接触状态时影响更大;通过润滑适当减小内侧轮轨摩擦因数,同时保持较大外侧轮轨摩擦因数可有效减小脱轨系数,提高车辆横向运行安全性;内外侧轮轨磨耗指数主要由所在侧轮轨黏着状态决定,且随曲线半径增大而减小。
Based on the vehicle-track coupling dynamics theory,a metro vehicle-track coupling dynamics model considering different wheel-rail adhesion states was established,and the influence of different wheel-rail interface adhesion states and curve radius on the dynamic interaction of wheel-rail system was analyzed.The results show that when the vehicle passes through the curve section,the adhesion state of the wheel-rail interface has a significant impact on the wheelset motion attitude and the dynamic interaction of the wheel-rail system.The existence of low adhesion contact state at the wheel-rail interface will weaken the wheelset guidance ability,resulting in an increase in the derailment coefficient,especially when there is low adhesion contact state at the outer wheel-rail interface.The derailment coefficient can be effectively reduced by properly reducing the inner wheel-rail friction coefficient through lubrication while maintaining a larger outer wheel-rail friction coefficient,thus improving the safety of vehicle lateral operation.The inner and outer wheel-rail wear index is mainly determined by the adhesion state of the wheel-rail on the corresponding side,and decreases with the increase of the curve radius.
作者
胡佳华
金潇
张涛
杨云帆
凌亮
王开云
HU Jiahua;JIN Xiao;ZHANG Tao;YANG Yunfan;LING Liang;WANG Kaiyun(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China;National Innovation Center of High Speed Train,Qingdao Shandong 266111,China)
出处
《铁道建筑》
北大核心
2023年第2期17-22,共6页
Railway Engineering
基金
国家自然科学基金(U2268210)。
关键词
地铁车辆
曲线区段
数值模拟
轮轨动态相互作用
黏着状态
摩擦因数
磨耗指数
metro vehicle
curve section
numerical simulation
wheel-rail dynamic interaction
adhesion state
friction factor
wear index
