地震作用对中速磁浮列车-轨道-桥梁系统耦合振动的影响研究  

Study on the influence of seismic action on coupling vibration of medium speed maglev vehicle-track-bridge system

作　　者：唐昊天 黄凤华[2] 滕念管[1] TANG Haotian;HUANG Fenghua;TENG Nianguan(School of Naval Architecture,Ocean&Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;College of Civil Engineering,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]南京工业大学土木工程学院,江苏南京211816

出　　处：《铁道科学与工程学报》2023年第10期3884-3895,共12页Journal of Railway Science and Engineering

基　　金：国家重点研发计划项目(2016YFB1200601-B27)。

摘　　要：随着磁浮交通线路的不断扩展,地震作用对磁浮交通系统的安全性构成了严重威胁。为探究地震作用对中速磁浮列车-轨道-桥梁系统振动响应特性的影响,基于考虑比例-积分-微分(PID)主动悬浮控制的磁浮车轨耦合关系,在绝对坐标系下建立磁浮列车-轨道-桥梁系统地震响应数值计算模型,其中将车辆简化为具有45个自由度的多刚体,轨道-桥梁结构采用有限元法建立。在此基础上,编制相应的仿真程序,计算只考虑车辆作用、只考虑地震作用以及同时考虑车辆和地震作用3种工况下系统的动力响应,并分析车速对系统地震响应的影响规律。研究结果表明:地震作用对磁浮列车-轨道-桥梁系统耦合振动影响明显,尤其是对横向耦合振动的影响;轨道-桥梁结构跨中竖向位移受车辆作用影响较大,跨中横向位移主要受地震作用影响;轨道-桥梁结构的频域响应与车辆荷载的特征频率及结构固有频率密切相关,地震作用会显著放大轨道-桥梁结构的1阶固有频率振动响应;同时考虑车辆作用和地震作用时,随着车速提高,车体加速度幅值与桥梁跨中竖向位移幅值并非单调变化,而桥梁跨中横向位移幅值呈现下降趋势。研究成果可为后续磁浮列车-轨道-桥梁耦合系统地震响应分析和轨道-桥梁结构设计提供理论支撑。With the continuous expansion of maglev transit lines,seismic action poses a serious threat to the safety of the maglev system.A numerical model of the maglev vehicle-track-bridge system was set up in an absolute coordinate system to investigate the impact of seismic action on the vibration response characteristics of the medium speed maglev vehicle-track-bridge system.This model was based on the coupling relationship of the maglev vehicle-track and considered the proportional-integral-differential(PID)active suspension control.The vehicle was simplified as a multi-rigid body with 45 degrees of freedom,and the track-bridge structure was constructed using the finite element method.On this basis,a corresponding simulation program was compiled to calculate the system’s dynamic responses under three working conditions:considering only the vehicle action,considering only the seismic action,and considering both the vehicle action and the seismic action.Furthermore,the influence of vehicle speed on the seismic response of the system was analyzed.The results show that the seismic action has an obvious influence on the vibration response of the maglev vehicle-track-bridge system,especially on the lateral coupling vibration.The vertical displacement in the middle span of the track-bridge structure is greatly affected by vehicle action,while the lateral displacement in the middle span is mainly affected by seismic action.The frequency responses of the track-bridge structure are closely related to the characteristic frequency of vehicle load and the structure’s natural frequencies.The track-bridge structure’s first-order natural frequency vibration response would be significantly amplified after considering the seismic action.Under the combined effect of the vehicle and seismic loads,the acceleration amplitude of the vehicle and the vertical displacement amplitude at the mid-span of the bridge do not change monotonically with the increase of vehicle speed,while the lateral displacement amplitude of the bridge shows a d

关 键 词：中速磁浮 列车-轨道-桥梁系统 地震作用 耦合振动 PID控制器 

分 类 号：U237[交通运输工程—道路与铁道工程]