弹性车轮对大跨斜拉桥车桥耦合振动的抑制特性  

Suppression characteristics of vehicle⁃bridge coupling vibration of long⁃span cable⁃stayed bridge with resilient wheels

作　　者：陈兆玮 蒲前华 CHEN Zhao-wei;PU Qian-hua(Mechatronics and Vehicle Engineering,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学机电与车辆工程学院,重庆400074

出　　处：《吉林大学学报（工学版）》2023年第9期2519-2532,共14页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(52008067);重庆市自然科学基金项目(CSTB2022NSCQ-MSX1193);重庆市教育委员会科学技术研究项目(KJZD-M202300701)。

摘　　要：为了从动力学角度探明地铁车辆-桥梁(特别是大跨斜拉桥)系统对弹性车轮的适应性,本文开展了大跨斜拉桥上弹性车轮对地铁车桥系统振动的影响及抑制特性研究。基于车辆-轨道耦合动力学理论,建立了考虑弹性车轮的地铁车辆-大跨斜拉桥系统耦合动力学模型;借助该模型,研究了长-短波不平顺联合激扰下弹性车轮对地铁车辆和大跨斜拉桥的振动特性的影响,并从时-频域角度探明了弹性车轮对地铁车辆-大跨斜拉桥系统的减振效果。研究结果表明:当地铁车辆通过大跨斜拉桥时,弹性车轮能有效降低轮轨作用力以及车轮和轴箱的振动;与传统刚性车轮相比,弹性车轮轮箍振动最剧烈,传统刚性车轮振动其次,而弹性车轮轮芯振动最小;基于本文所采用的弹性车轮动力学参数,弹性车轮的振动卓越频率集中在10~50 Hz,且在25Hz左右存在峰值;桥梁垂向和横向振动主频均在1 Hz左右,且弹性车轮能有效降低大跨斜拉桥的中、低频振动。In order to prove the adaptability of the metro train-bridge(especially long-span bridge)system to resilient wheels from the perspective of dynamics,the influence of resilient wheels on the long-span cable-stayed bridge(LSCSB)on the vibration of the metro train-bridge system and its suppression characteristics was studied.Based on the vehicle-track coupling dynamics theory,a coupled dynamic model of metro train-LSCSB system considering resilient wheel was established.Adopting the model,the effect of resilient wheels on the vibration characteristics of metro train and LSCSB under the combined disturbance of long-short wave irregularities was studied,the damping effect of resilient wheel on metro train-LSCSB system is proved from time-frequency domain.The results show that when metro train running through, the resilient wheel can effectively reduce the wheel/rail force, vibration of the wheel and axle box. Compared with the traditional rigid wheel, the vibration of rim is the most intense, followed by the vibration of traditional rigid wheel, and the vibration of web is the smallest. Based on the propesd dynamic parameters of the resilient wheel, the excellent frequency of the resilient wheel vibration is concentrated in 10 Hz to 50 Hz, and there is a peak around 25 Hz. The main frequency of the bridge vertical and lateral vibration is about 1 Hz. The resilient wheels can effectively reduce the mid-low frequency vibrations of LSCSB.

关 键 词：车辆工程 弹性车轮 大跨斜拉桥 时-频分析 减振 

分 类 号：U24[交通运输工程—道路与铁道工程]