摘要
3号道岔侧股的曲线半径较小,受到的轮轨冲击力较大,这在一定程度上降低了有轨电车侧向过岔的安全性。为研究有轨电车侧向通过3号道岔时的动力学性能,选取了列车运行速度、摩擦系数、轨距和坡度4个参数作为影响因素。基于车辆动力学理论,对比分析了各影响因素不同取值下有轨电车侧逆向和侧顺向通过3号道岔时轮轨垂向力、轮轨横向力、脱轨系数及轮重减载率的变化规律。仿真结果表明,有轨电车侧顺向通过3号道岔的动力学性能总体优于侧逆向;在不同的速度、轨距和坡度工况下,侧顺向过岔的安全性优于侧逆向;在不同的摩擦系数工况下,侧逆向过岔的安全性优于侧顺向。4种影响因素对有轨电车侧向通过3号道岔时的轮重减载率影响最大。4种因素中,列车运行速度和摩擦系数对有轨电车侧向过岔的影响较为显著。
The curve radius of No.3 turnout side strand is small,and the received wheel/rail impact force is relatively large,which reduces the safety of tram lateral passing through turnout to a certain degree.To study the performance of tram dynamics when passing through No.3 turnout,four tram running parameters of speed,friction coefficient,gauge and gradient are selected as influencing factors.Based on vehicle dynamics theory,the variation laws of wheel/rail vertical force,wheel/rail lateral force,derailment coefficient and wheel load reduction rate when the tram passes through No.3 turnout in reverse and forward directions by the side with different values of each influencing factor are compared and analyzed.The simulation results show that,the dynamics performance of the tram passing through No.3 turnout in the forward direction is generally better than that in the reverse direction;under different working conditions of speed,gauge and gradient,the safety of lateral forward crossing turnout is better than that of lateral reverse crossing turnout;under different friction coefficient conditions,the safety of lateral reverse crossing turnout is better than that of lateral forward.These four influencing factors have the greatest impact on the wheel load reduction rate when the tram passes through No.3 turnout laterally.Among the four factors,tram running speed and friction coefficient have a significant impact on the lateral crossing of the tram.
作者
赵思琪
徐井芒
马前涛
梁新缘
王平
陈嘉胤
ZHAO Siqi;XU Jingmang;MA Qiantao;LIANG Xinyuan;WANG Ping;CHEN Jiayin(Key Laboratory of High-speed Railway Engineering of Ministry of Education,Southwest Jiaotong University,610031,Chengdu,China)
出处
《城市轨道交通研究》
北大核心
2023年第3期24-29,共6页
Urban Mass Transit
基金
国家自然科学基金(51778542、51978586、U1734207)。
关键词
有轨电车
3号道岔
侧向过岔
动力学性能
tram
No.3 turnout
lateral passing turnout
dynamics performance
