Page 102 - 201903

第 38 卷 第 3 期 Vol. 38, No. 3
2019 年 5 月 Journal of Applied Acoustics May, 2019

⋄ 研究报告 ⋄

混凝土箱梁相似模型结构噪声对比分析 ∗

雷晓燕 1† 欧开宽 1 罗 锟 1 汪振国 1 曾少辉 2

(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 南昌 330013)
(2 南昌华路建设咨询监理有限公司 南昌 330013)
摘要 为探讨混凝土箱梁噪声的时变特性，以京沪高铁 32 m 混凝土简支箱梁为原型，制作了 1 : 10 的缩尺模
型，通过模态试验的方法验证箱梁模型与原型的相似关系，通过声学试验验证箱梁声学计算模型的正确性。然
后，建立了箱梁缩尺模型与原型两种计算模型，利用有限元和边界元法求出两种模型的瞬态结构噪声。研究发
现，箱梁缩尺模型与箱梁原型的材料参数满足一定关系，模型试验的方法能够验证箱梁模型与箱梁原型之间
符合相似关系，箱梁模型的振动噪声测试结果能真实反映原型振动噪声水平。两种模型的结构噪声在时域内
声压级及对应场点的声压存在一定相似关系。该研究可为箱梁缩尺模型结构噪声反演至箱梁原型提供依据，
所采用的方法和得到的结果对桥梁结构振动与声辐射实验研究具有参考作用。
关键词 箱梁，缩尺模型，结构噪声，瞬态声辐射
中图法分类号: U441.3 文献标识码: A 文章编号: 1000-310X(2019)03-0384-08
DOI: 10.11684/j.issn.1000-310X.2019.03.014

Comparative analysis on structural noise of similarity model of

concrete box girder

LEI Xiaoyan 1 OU Kaikuan 1 LUO Kun 1 WANG Zhenguo 1 ZENG Shaohui 2

(1 Engineering Research Center of Railway Environment Vibration and Noise Ministry of Education,
East China Jiao tong University, Nanchang 330013, China)
(2 Nanchang Hualu Consultant Co., Ltd., Nanchang 330013, China)

Abstract To explore the time-varying characteristics of low-frequency noise of concrete box girder, a scale
model (1/10) was made by taking 32 m concrete simple box-girder of Beijing-Shanghai High Speed Railway. The
similarity between the box girder model and the prototype is verified by the modal test method, the acoustic
test is used to verify the correctness of the acoustic model of the box girder. Then, two calculation models of
box girder scale model and prototype are established, and the transient structure noise of the two models is
obtained by using finite element method and boundary element method. It is found that the box girder scale
model and the material parameters of the box girder prototype satisfy a certain relationship, the model test
method can verify the similar relationship between the box girder model and the box girder prototype, the
vibration and noise test results of the box girder model can truly reflect the prototype vibration noise level.
The structural noise of the two models has a similar relationship between the sound pressure level in the time
domain and the sound pressure of the corresponding field. This research can provide a basis for the inversion of
box girder model structure noise to the box girder prototype, the method and results obtained have a reference
for the experimental study of bridge structure vibration and acoustic radiation.
Key words Box girder, Scale model, Structure noise, Transient sound radiation

2018-09-20 收稿; 2018-12-29 定稿
国家自然科学基金项目 (51478184, 51868023, 51668019), 江西省教育厅重点课题项目 (GJJ170357), 江西省教育厅青年课题项目
∗
(GJJ170419), 江西省教育厅一般课题项目 (GJJ180297), 江西省自然科学基金面上项目 (20171BAB206057)
作者简介: 雷晓燕 (1956- ), 男, 江西丰城人, 博士, 教授, 博士生导师, 研究方向: 轨道交通环境振动与噪声。
† 通讯作者 E-mail: xiaoyanlei2013@163.com