噪声与振动控制2017，Vol.37Issue(6)：12-16,22,6.DOI:10.3969/j.issn.1006-1355.2017.06.003
铁路箱梁辐射结构噪声测试与开孔影响分析
Structural Noise Radiation Test and Opening Impact Analysis of Railway Box Girders
摘要
Abstract
Railway simply supported box girder is often perforated on its top plate, bottom plate and web due to the demand of heat balance between the inside and the outside of the box, ventilation, drainage and so on. According to the field measurement, intracavity noise will leak out through the holes and increase the wayside noise. So, it is necessary to study the influence of the perforation on the radiation noise of the box girder. The study shows that the vibration frequency of the box beam plates is mainly concentrated in the range of 40 Hz-250 Hz. The noise around the bottom plate is mainly generated by the vibration of the bottom plate. The noise around the web plate is mainly generated by the vibration of the web and the flange. By comparing the measured and the theoretical values of the models of the box girder with and without perforation, the theoretical value of noise with perforation is larger than that without perforation, and is closer to the measured value. The effect of perforation on the near field noise cannot be ignored. The theoretical calculation model with perforation is able to simulate the structure-borne noise of the actual box girder more accurately.关键词
声学/箱梁/开孔/结构噪声/现场试验/数值仿真Key words
acoustics/box-girder/perforation/structure-borne noise/field measurement/numerical simulation分类
海洋科学引用本文复制引用
宋瑞,刘林芽,徐斌,刘全民..铁路箱梁辐射结构噪声测试与开孔影响分析[J].噪声与振动控制,2017,37(6):12-16,22,6.基金项目
国家自然科学基金资助项目(51578238,51608201,51569016) （51578238,51608201,51569016）
江西省优势科技创新团队资助项目(20152BCB24007) （20152BCB24007）
