客运专线钢板结合连续梁桥结构噪声分析

发布时间：2019-01-06 14:28

【摘要】：研究目的:钢板结合梁桥因使用了具有较大面积的钢结构构件而向周围环境辐射较大的结构噪声,这种噪声尚无法通过传统的声屏障措施予以抑制。为了有的放矢地提出结构噪声治理措施,首要任务应掌握该类桥梁结构噪声的频率、空间分布特性,以及桥梁各部分的噪声贡献率。为此,本文基于统计能量原理对一座典型的钢板混凝土结合梁桥的结构噪声进行分析,从而获得其辐射噪声的各种规律。研究结论:(1)钢板结合梁桥结构噪声以125~1 250 Hz为主,属于中高频辐射噪声;(2)基于典型声场场点的计算结果,在各桥梁部件中,钢主梁腹板是最主要的噪声源,其辐射贡献率达50%以上;(3)该类桥梁结构噪声在地面附近处的衰减速度随着距离的增加而变缓;(4)该研究成果可为铁路钢板结合梁桥的结构噪声治理提供技术指导。
[Abstract]:Research purpose: the steel plate combined beam bridge radiates a large amount of structural noise into the surrounding environment because of the use of large steel structural members, which can not be suppressed by the traditional sound barrier measures. In order to put forward the structural noise control measures, the most important task should be to master the frequency, spatial distribution characteristics and the noise contribution rate of each part of the bridge. Therefore, based on the statistical energy principle, the structural noise of a typical steel plate concrete composite beam bridge is analyzed in this paper, and various rules of radiation noise are obtained. The conclusions are as follows: (1) the structural noise of steel plate combined beam bridge is 125U 1 250 Hz, which belongs to the middle and high frequency radiation noise; (2) based on the calculated results of typical sound field points, the steel main girder web is the most important noise source among the bridge components, and its radiation contribution rate is more than 50%; (3) the attenuation speed of the bridge structure noise in the vicinity of the ground becomes slower with the increase of the distance. (4) the research results can provide technical guidance for the structural noise treatment of the railway steel plate combined beam bridge.
【作者单位】：铁道第三勘察设计院集团有限公司;
【基金】：国家高技术研究发展计划(863计划)(2011AA11A103)
【分类号】：U441.3

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