城市轨道交通箱梁桥板件对其声辐射的影响  

Influence of Box Girder Bridge Plates on the Acoustic Radiation in Urban Rail Transits

作　　者：张小安[1] 翟婉明[2,1] 石广田 张晓芸[1] ZHANG Xiaoan;ZHAI Wanming;SHI Guangtian;ZHANG Xiaoyun(School of Mechanical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Train and Track Research Institute,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》2021年第4期190-197,共8页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(51868037,61863021);国家自然科学基金重大资助项目(11790280);甘肃省科技计划资助项目(20JR5RA381);西南交通大学牵引动力国家重点实验室开放课题资助项目(TPL2102)。

摘　　要：轨道交通运营过程中自身引起的噪声问题已成为限制其发展的关键因素之一,其中桥梁辐射低频结构噪声使得高架线路的噪声问题更加突出,并且低频噪声所带来的影响甚至强于中高频噪声;因此为了抑制轨道交通运营时所引起的桥梁结构噪声,目前已开展大量关于桥梁结构声辐射问题的研究。研究桥梁结构声辐射最主要目的是设计低噪声桥型和制定既有线的降噪措施,而在设计时首先需要确定桥梁结构的主要发声部件,才能更有针对性进行相关设计。以城市轨道交通箱梁桥为研究对象,采用列车-轨道-桥梁相互作用理论和声学边界元法对箱梁桥的声振特性进行预测,结合箱梁桥的声辐射机理,对箱梁桥各板件的声辐射贡献进行详细研究,系统分析箱梁桥的振动特性与板件声辐射贡献之间的关系,相关研究能够为准确判定箱梁桥的主要发声部件以及后续提出减振降噪措施建立一定的基础,进而提高降噪设计的有效性。The self-induced noise problems in the operation of rail transit are the key factors which limit the rail transit development.Among them,the noise problem of elevated lines was more prominent because of the low-frequency structural noise radiated to the bridge,and the influence of low-frequency noise was even stronger than that of medium and highfrequency noise.Therefore,in order to suppress the noise of the bridge structure caused by rail transit operation,a lot of researches on the acoustic radiation of bridge structures are carried out.The main purpose of studying the acoustic radiation of bridge structures is to realize the design of low-noise bridges and prepare the noise reduction measures for the existing lines.While in the design,it is necessary to determine the main acoustic components of the bridge structures to carry out the relevant design.In this paper,with an urban rail-transit box-girder bridge as the research object,the train-track-bridge interaction theory and the acoustic boundary element method were used to predict its sound and vibration characteristics.According to the sound radiation mechanism of the box girder bridge,the acoustic radiation contribution of each plate on the box girder bridge was studied in detail,and the relationship between the vibration characteristics of the box girder bridge and the acoustic radiation contributions of the plates were analyzed systematically.The relevant research has established a foundation for accurately determining the main sound components of the box girder bridges and proposing the subsequent vibration and noise reduction measures.

关 键 词：声学 城市轨道交通 箱梁桥 声辐射 板件声辐射贡献 振动与声辐射关系 

分 类 号：U239.5[交通运输工程—道路与铁道工程] X121[环境科学与工程—环境科学]