曲线超高率对跨座式单轨车桥耦合系统振动影响  

Influences of Curve Superelevation Rate on the Vibration of Straddle Monorail Vehicle-bridge Coupling Systems

作　　者：肖乾 高雪山 周新建 李子珺 XIAO Qian;GAO Xueshan;ZHOU Xinjian;LI Zijun(Key Laboratory of Vehicles and Equipment,State Ministry of Education,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]华东交通大学载运工具与装备教育部重点实验室,南昌330013

出　　处：《噪声与振动控制》2021年第6期6-11,共6页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(52065020)。

摘　　要：曲线超高率与车辆运行状态有密切关系,为探究其对车辆-轨道梁耦合系统振动的影响规律,根据多体动力学理论且基于柔性曲线轨道梁,建立跨座式单轨车桥刚柔耦合系统动力学模型,研究不同曲线超高率和速度等级对轨道梁和车体动力响应的影响规律,并通过车辆水平轮径向力及车体侧滚角反映车辆运行状态变化。结果表明:当增大曲线超高率时,轨道梁跨中竖向位移响应值先减小后增大,车辆以40 km/h速度运行时,横向位移响应值逐渐朝向弯道内侧增大;当速度为50 km/h~65 km/h时,横向位移响应值由弯道外侧向内侧先减小后增加,车体横向动力响应所受影响比竖向动力响应更为显著。在合适的曲线超高率下运行有利于提高车辆运行品质。Curve superelevation rate is closely related to the running state of vehicles.In order to explore the influence of curve superelevation rate on the vibration of vehicle-track beam coupling system,a dynamic model of rigid-flexible coupling system of straddle monorail vehicle-bridge is established based on the multi-body dynamics theory and considering the track beam flexibility characteristics.The influence of different curve superelevation rate and speed grade on the dynamic response of the track beam and car body is studied,and the change of vehicle running state is reflected by the radial force of horizontal wheel and rolling angle of vehicle body.The results show that when the curve superelevation rate is increased,the vertical displacement response value at the middle of span of the track beam decreases initially and increases later.When the vehicle is running at the speed of 40 km/h,the lateral displacement response value gradually increases towards the inner side of the curve.When the speed is from 50 km/h to 65 km/h,the lateral displacement response value decreases first from the outer side of the curve to the inner side and then increases towards the inner side,which affects the lateral dynamic response of the vehicle body more significantly than the vertical dynamic response.Vehicle operation at the suitable curve superelevation rate is beneficial for the improvement of operation quality.

关 键 词：振动与波 轨道车辆 单轨车桥刚柔耦合系统 曲线超高率 动力响应 

分 类 号：U279.5[机械工程—车辆工程]