基于混合FE-SEA法的箱梁结构噪声特性研究  

Structural Noise of Box Girder for Elevated Track:An Analysis Based on the Hybrid FE-SEA Model and Experiment

作　　者：雷晓燕[1] 翁凌霄 余亮亮 王鹏生 罗锟[1] Lei Xiaoyan;Weng Lingxiao;Yu Liangliang;Wang Pengsheng;Luo Kun(Engineering Research Center of Railway Environment Vibration and Noise of the Ministry of Education,East China Jiaotong University,Nanchang 330013,China;College of Electronical and Information Engineering,Nanchang Normal College of Applied Technology,Nanchang 330108,China;Shenzhen Integrated Transportation Design Research Institute Co.,Ltd.,Shenzhen 518001,China)

机构地区：[1]华东交通大学铁路环境振动与噪声教育部工程研究中心,江西南昌330013 [2]南昌应用技术师范学院电子与信息工程学院,江西南昌330108 [3]深圳综合交通设计研究院,广东深圳518001

出　　处：《华东交通大学学报》2023年第4期1-8,共8页Journal of East China Jiaotong University

基　　金：国家自然科学基金项目(51978264);江西省科技厅科技计划项目(20223AEI191004);江西省教育厅科技项目(GJJ219001)。

摘　　要：为探讨箱梁结构噪声规律及其影响因素,以南昌某高架铁路箱梁为研究对象,建立混合FE-SEA模型进行数值仿真分析,并进行现场试验验证。在此基础上,探讨了板厚对结构噪声的影响规律,分析了箱梁各子系统对远场声压的声贡献量。研究结果表明:混合FE-SEA法适用于箱梁结构噪声研究;箱梁结构振动的峰值频率为125 Hz,结构噪声频率范围为50~160 Hz;箱梁顶板和翼板对远场声压级的贡献量较大:增加各板厚度能降低结构噪声,其中增加顶板厚度效果较为明显。因此在减振降噪的过程中,应着重关注顶板和翼板。To study the vibration and noise characteristics of elevated railway bridge structures and the influencing factors,a certain elevated railway bridge on the Shanghai-Kunming high speed railway was taken as the research object,a hybrid FE-SEA model for numerical simulation analysis was established and on-site experimental verification was conducted.Accordingly,the influence of plate thickness on structural noise and the contribution of each bridge plate subsystem to the overall noise were analyzed.The results showed that the FE-SEA method is suitable for the study of structural noise of elevated railway bridge.The peak frequency of vibration for the box girder structure is 125 Hz.and the frequency of structural noise ranges from 50 Hz to 160 Hz.The top plate and wing plate of the box girder contribute considerably to the far-field sound pressure level.The results indicated that increasing the thickness of each plate can reduce the structural noise,and this reduction is greater when the thickness of the top plate is increased.

关 键 词：FE-SEA模型 结构噪声 现场试验 箱梁 

分 类 号：U24[交通运输工程—道路与铁道工程]