摘要
虚拟轨道车辆作为新型轨道交通,由于多节编组结构导致车辆自由度较多,可能会出现甩尾、横摆、折叠等不稳定现象,影响车辆行驶稳定性和平稳性。虚拟轨道车辆通过铰接系统进行连接,铰接系统阻尼较小,车辆易出现跑偏、失稳等情况,阻尼较大,则会降低列车的灵活性。基于某三模块六轴虚拟轨道车辆实际参数,建立车辆系统动力学模型,选择直线、换车道以及1/4圆曲线等典型工况,通过联合仿真等方法分析铰接阻尼对车辆动力学性能的影响。研究结果表明:直线工况下,增大阻尼系数能够有效抑制车辆的横摆角加速度,提高车辆的横向平稳性;在B级路谱、70 km/h工况下,阻尼系数为10^(7)N·s/m时,横向平稳性相比未安装铰接减振器降低14.1%,但对车辆垂向平稳性影响较小。换车道工况,阻尼系数过大或过小均会使列车的横向稳定性恶化,合理的阻尼系数将提高车辆的横摆阻尼比,减小车辆间的横向摆振,从而控制后部放大系数和轨迹偏移量;阻尼系数为10^(7)N·s/m时,后部放大系数显著减小,且轨迹偏移量由0.724 m降至0.511 m,减小29.4%。1/4圆曲线工况,增设铰接系统减振器将降低车辆的曲线通过性能,当阻尼系数为10^(7)N·s/m时,转向通道宽度增大10.8%。
Virtual track trains are a new type of rail transportation,the multisection formation structure leads to more degrees of freedom of the vehicle,which may cause unstable phenomena,such as tailing,cross-swing,folding,etc.,affecting the stability and ride comfort of the vehicle driving.Virtual track train is connected by articulated system,and if the damping of the articulated system is small,the train is prone to runaway and instability,etc.If the damping is large,it will reduce the flexibility of the train.Based on the actual parameters of a three-module six-axle virtual tracktrain,a vehicle system dynamics model is established.Typical working conditions such as straight line,lane change and 1/4 circle curve are selected,and the impact of articulated damping on vehicle dynamics performance is analyzed through co-simulation and other methods.The results show that under straight-line conditions,increasing the damping coefficient can effectively suppress the yaw angular acceleration and improve the lateral ride comfort of the vehicle.Under B-class road spectrum and 70 km/h operating conditions,with the damping coefficient of 10^(7) N⋅s/m,the lateral ride comfort is reduced by 14.1%compared to not installing articulated system dampers,but has little effect on the vertical ride comfort.Under lane change conditions,too large or small damping coefficients will deteriorate the train’s lateral stability,and a reasonable damping coefficient will improve the yaw damping ratio of the vehicle and reduce the lateral sway vibration between vehicles,thus controlling the rearward amplification and offtracking.When the damping coefficient is 10^(7) N⋅s/m,the rear amplification significantly decreases,and the offtracking of the train decreases by 29.4%,from 0.724 m to 0.511 m.Under the 1/4 circle curve conditions,the additional articulated system damper will reduce the vehicle’s curve passing performance.When the damping coefficient is 10^(7) N⋅s/m,the turning aisle width increases by 10.8%.
作者
李超
季元进
黄有培
冷涵
杨毛振宁
任利惠
Li Chao;Ji Yuanjin;Huang Youpei;Leng Han;Yang Maozhenning;Ren Lihui(Institute of Rail Transit,Tongji University,Shanghai 201804,China)
出处
《机电工程技术》
2023年第8期1-6,共6页
Mechanical & Electrical Engineering Technology
基金
国家自然科学基金资助项目(52205121)。
关键词
虚拟轨道车辆
车辆动力学
铰接系统
阻尼系数
virtual track train
vehicle dynamics
articulated system
damping coefficient
