噪声与振动控制Issue(1)：160-164,5.DOI:10.3969/j.issn.1006-1335.2015.01.033
高铁板式轨道区段箱梁结构噪声辐射分析
Noise Radiation Analysis of Box-girder Structure in Slab Track Section of High Speed Railways
摘要
Abstract
A high speed train-track coupling dynamics model was established using Simpack software, and the wheel/rail vertical contact force excited by track irregularity spectrum was calculated. The wheel/rail vertical force was taken as a boundary condition and applied to the finite element model (FEM) of an elevated box girder structure to calculate its surface vibration response. Then, the vibration response was taken as the acoustic boundary conditions and was applied to the bound-ary element model (BEM) of the elevated box-girder structure to analyze its sound radiation. The results show that, using the finite element method and the boundary element method, the vibration noise of the concrete simply-supported box-beam structure can be effectively calculated with shell elements. The vibration noise is mainly concentrated in the low frequency range of 0-200 Hz, and the peaks mainly appear at the central frequencies of 16 Hz, 25 Hz, 80 Hz-100 Hz. The sound pres-sure level decreases with the increase of the distance from the ground in the lateral sound field and this tendency is more ob-vious for lower frequency sound field. The sound pressure level generally increases with the increase of the distance from the ground in the vertical acoustic field, and the sound pressure level in far field area does not change obviously for the fre-quencies below 31.5 Hz. In the range of 80 Hz-100 Hz, the sound pressure levels of the field points near the girder, especial-ly above the girder, are higher than those in the other regions.关键词
声学/结构噪声/高速铁路/高架箱梁/板式轨道Key words
acoustics/structuce noise/high speed railway/elevated box girder/slab track分类
通用工业技术引用本文复制引用
石广田,杨新文,张小安,杨建近..高铁板式轨道区段箱梁结构噪声辐射分析[J].噪声与振动控制,2015,(1):160-164,5.基金项目
国家自然科学基金资助项目(51165017) （51165017）
