高铁箱梁桥顶板纵向加筋对其声振特性的影响  

Effect of Longitudinal Stiffened Plate on Acoustic Radiation Characteristics of High-speed Railway Box Girder Bridge

作　　者：王杰 张小安[1,2] 杨建近 包能能 张晓芸 石广田 WANG Jie;ZHANG Xiaoan;YANG Jianjin;BAO Nengneng;ZHANG Xiaoyun;SHI Guangtian(School of Mechanical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Institute of Train and Track,State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]兰州交通大学机电工程学院,兰州730070 [2]西南交通大学牵引动力国家重点实验室列车与线路研究所,成都610031

出　　处：《噪声与振动控制》2024年第1期261-267,共7页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(52362049);甘肃省自然科学基金资助项目(22JRA344,22JR11RA152);中央引导地方科技发展资金资助项目(22ZYIQA005);甘肃省教育厅青年博士基金资助项目(2022QB-063);兰州市科技计划资助项目(2022-ZD-131);兰州交通大学青年科学基金资助项目(2021014)。

摘　　要：伴随着高速铁路箱梁桥的大规模建设,列车经过时引起的高架桥低频声辐射问题已成为限制其发展重要因素之一。为了缓解列车经过箱梁桥时的声辐射问题,有必要开展桥梁降噪措施研究。以高速铁路箱梁桥为研究对象,对箱梁桥顶板增设纵向筋板,采用多体系统动力学软件UM及有限元-边界元方法建立车辆-轨道-桥梁耦合动力学模型和声学预测模型,对原结构箱梁桥和加筋板箱梁桥的振动加速度、辐射声功率、线性声压级和声场分布等进行分析,研究顶板纵向加筋对箱梁桥声振特性的影响。研究结果表明:增设纵向筋板后箱梁桥各个板件振动加速度都明显减小,在顶板处减幅最大;增设纵向筋板后箱梁桥的辐射声功率和声压级明显降低,降噪效果良好;其对桥上声场的降噪效果好于桥下和桥侧声场。With the large-scale construction of high-speed railway box girder bridges,the environmental noise caused by train passing has become one of the important factors restricting their development.In order to solve the problem of low frequency acoustic radiation induced by the trains passing through the box girder bridge,it is necessary to study the noise reduction measures of the box girder bridge.In this work,the high-speed railway box girder bridge with its upper plate reinforced by longitudinal ribs is taken as the research object.The coupling dynamics model of vehicle-rail-bridge and acoustic prediction model are established by using finite element method and boundary element method.The vibration acceleration,radiated acoustic power,linear sound pressure level and acoustic field distribution of the original box girder bridge and the reinforced box girder bridge are analyzed respectively,and the influence of the roof longitudinal reinforcement plate on the acoustic characteristics of box girder bridge is studied.The results show that the vibration acceleration of each plate of the box girder bridge decreases obviously after adding longitudinal ribs,and the amplitude decreases the most at the roof.The radiated sound power and sound pressure level of the box girder bridge are obviously reduced by adding longitudinal reinforcement plates,and the noise reduction effect is good.The effect of noise reduction at the top of the bridge is better than that under the bridge and on the side of the bridge.

关 键 词：振动与波 轨道交通 箱梁桥 筋板 声振特性 减振降噪 

分 类 号：U238[交通运输工程—道路与铁道工程] U270.1.6[机械工程—车辆工程]