城市轨道交通高架桥曲率对半封闭式声屏障车致振动影响研究  

Influence of the curvature of the viaduct on train-induced vibration of semi-closed noise barriers in urban rail transit

作　　者：谢伟平[1] 胡喆[2] 张良涛[2] 花雨萌 XIE Weiping;HU Zhe;ZHANG Liangtao;HUA Yumeng(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China;China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China)

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070 [2]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《振动与冲击》2020年第24期128-133,共6页Journal of Vibration and Shock

基　　金：武汉市城乡建设委员会科技计划项目(201741)。

摘　　要：以某城市轨道交通高架线为工程背景,实测列车在直线段和曲线段行驶时半封闭式声屏障的加速度响应,并对实测数据进行了时程和频谱分析。基于车-线-桥耦合振动理论,建立车-曲线桥-声屏障结构振动分析模型,对声屏障的振动进行仿真分析,并与实测数据对比以验证模型的准确性。基于数值模型分析了高架桥曲率对声屏障车致振动的影响规律,结果表明,城市轨道交通高架线曲线段半封闭式声屏障的车致振动响应大于直线段,以横向振动为主,优势频段为70~140 Hz,横向振动位移峰值与曲率呈线性正相关。研究得到了拟合公式,可近似计算不同曲率高架桥上半封闭式声屏障的振动响应。Taking an urban rail transit elevated line as the engineering background,field measurements have been made on the acceleration of the semi-closed noise barrier when a train was traveling in straight and curved sections,and time history and spectrum analysis were performed on the measured data.Based on the theory of vehicle-line-bridge coupled vibration,by establishing a vehicle-curve bridge-noise barrier structure vibration analysis model,the accuracy of the model was verified by comparison with the measured data.Based on the simulation model,the influence of the curvature of the viaduct on train-induced vibration of semi-closed noise barriers was analyzed.The results show that:In the urban rail transit elevated line,the train-induced vibration response of the semi-closed noise barriers in the curved section was greater than that in the straight line segment.The dominant frequency band of the main lateral vibration is 70—140 Hz,and the peak value of the lateral vibration displacement is linearly positively correlated with the curvature.The fitting formula was obtained,and the vibration response of the semi-closed noise barrier on the viaduct with different curvature could be approximated.

关 键 词：城市轨道交通 曲线桥 半封闭式声屏障 车-线-桥耦合振动分析 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3