噪声与振动控制2016，Vol.36Issue(6)：131-135,5.DOI:10.3969/j.issn.1006-1335.2016.06.026
基于车桥耦合的高架槽形梁结构噪声影响分析
Analysis for the Structure Noise of Simply Supported Trough Girders Considering Vehicle-bridge Vertical Interaction
摘要
Abstract
The structure noise of simply-supported trough girders in urban rail transit is analyzed. The model of vehicle-bridge coupling system for a 30 m reinforced concrete trough girder is built, and the corresponding finite element model and the acoustic boundary element model are established. The train’s spatial dynamics model is established by means of Simpack software, and the finite element model of the girder is established by Ansys software. Based on the combination of Simpack and Ansys codes, the wheel/rail exciting force is obtained. On the basis of calculating the vibration response of the trough girder under the action of train load, and using finite element-indirect boundary element hybrid acoustic analysis method, the influence of the bottom plate thickness and height of the web on the trough girder structure noise is discussed. The results show that increase of the thickness of the bottom plate can reduce the structure noise of the trough girder, but it does not mean that the thicker the bottom plate is, the better the noise reduction effect is. When the thickness of the bottom plate reaches a certain value, its influence on the noise reduction effect of the structure is limited. Variation of the web height can alter the direction of radiation attenuation of the bridge structure noise, and the structure noise radiation on both sides of the bridge attenuates fast. The radiation noise of the structure above the bottom plate is the strongest, but it has a tendency to decrease with the variation of the web height. The results of the analysis can provide some theoretical references for the optimal design of the rail transit trough beam structure.关键词
振动与波/耦合振动/联合仿真/结构噪声/有限元/间接边界元Key words
vibration and wave/coupled vibration/joint simulation/structure noise/finite element/indirect boundary element分类
交通工程引用本文复制引用
曾峰,刘林芽,吴宇鹏,宋瑞..基于车桥耦合的高架槽形梁结构噪声影响分析[J].噪声与振动控制,2016,36(6):131-135,5.基金项目
国家自然科学基金资助项目（51268014，51578238)；江西省“赣鄱英才555工程”领军人才培养计划资助项目 （）
