摘要
[目的]为探究地铁车辆侧向和正向通过12号道岔时的安全性问题,为道岔结构优化与维护提供理论依据,需对地铁车辆-道岔耦合模型动力学性能进行研究。[方法]基于刚柔耦合动力学理论,构建包含车辆、轮轨、道岔等3个子系统的耦合动力学模型。通过模拟车辆侧向与正向通过道岔工况,对轮轨垂向力和横向力、轮轴横向力、脱轨系数及动态轮重减载率等核心指标数据进行分析。[结果及结论]车辆在侧向和正向两种通过道岔方式下,轮轨垂向力最大值未超过容许阈值,轮轨横向力与轮轴横向力均处于动态平衡范围内;脱轨系数稳定在临界限值以下,动态轮重减载率始终低于安全限值。研究证实,基于刚柔耦合动力学理论构建的地铁车辆-道岔耦合模型能够有效评估车辆通过道岔的安全性。
[Objective]To investigate the safety of metro vehicles passing through No.12 turnouts in both lateral and forward directions,providing a theoretical basis for the optimization and maintenance of turnout structures,it is necessary to study the dynamic performance of a metro vehicle-turnout coupling model.[Method]Based on the theory of rigid-flexible coupled dynamics,a coupled dynamic model comprising three subsystems—vehicle,wheel-rail,and turnout—is established.By simulating the operating conditions of vehicles passing through the turnout laterally and forward,key indicators such as wheel-rail vertical and lateral forces,wheelset lateral force,derailment coefficient,and dynamic wheel load reduction ratio are analyzed.[Result&Conclusion]Under both lateral and forward passing conditions,the maximum wheel-rail vertical force will not exceed the allowable threshold,and both wheel-rail lateral force and wheelset lateral force remain within the dynamic equilibrium range.The derailment coefficient remains below the critical limit,and the dynamic wheel load reduction ratio is consistently lower than the safety threshold.This research confirms that the metro vehicle-turnout coupling model based on rigid-flexible coupled dynamics can effectively evaluate the safety of vehicle passage through turnout.
作者
李华伟
许孝堂
刘韦
何俊
LI Huawei;XU Xiaotang;LIU Wei;HE Jun(Zhuzhou Times New Material Technology Co.,Ltd.,412007,Zhuzhou,China;School of Civil Engineering,Southwest Jiaotong University,610031,Chengdu,China)
出处
《城市轨道交通研究》
北大核心
2025年第6期160-167,共8页
Urban Mass Transit
基金
广西创新驱动发展专项资金项目(桂科AA21077011-4)。
关键词
地铁
车辆-道岔动力学性能
刚柔耦合模型
metro
vehicle-turnout dynamics performance
rigid-flexible coupled model
