铁道科学与工程学报2017，Vol.14Issue(1)：73-79,7.
多特征频率下槽形梁面板综合声学贡献量分析
Application of integrated panel acoustics contribution theory in the study of simply-supported trough girder under multi-characteristic frequency
摘要
Abstract
in order to study the integrated panel acoustics contribution of simply-supported trough girder in urban rail transit. Taking a 30m concrete trough girder as the research object , currying out the characteristic research on the acoustic radiation of the structural system Structural acoustic radiation characteristics. Finite element method and boundary element method are used to establish the finite element model and the acoustic boundary el-ement model, and the acoustic radiation characteristics of the Trough Girder are analyzed by the method of the indirect boundary element method. On the basis of the above, the acoustic analysis of the structural noise of the trough girder is performed by using the acoustic transfer vector method.Introduced the weight coefficient of char-acteristic frequency and field point to determine the frequency character of integrated acoustic contribution amount the biggest key trough girder panel under multi-characteristic frequency. The results of the study show that:the structure noise of trough girder dominated by 20~80Hz low frequency and the field point at 31.5 Hz and 63Hz appeared peak noise;the sound pressure of trough girder is mainly contributed by the bottom plate, flange plate to integrated sound pressure with smaller, web of far field have negative effects on integrated far filed sound pressure;Structural optimization of the key panel should be carried out to improve the performance of the struc-ture noise.关键词
轮轨激励/辐射噪声/声传递向量/面板贡献Key words
Wheel / rail excitation/radiated noise/acoustic transfer vector/panel contribution分类
交通工程引用本文复制引用
刘林芽,曾峰,许代言,姚忠達..多特征频率下槽形梁面板综合声学贡献量分析[J].铁道科学与工程学报,2017,14(1):73-79,7.基金项目
国家自然科学基金资助项目(51268014,51578238) （51268014,51578238）
江西省“赣鄱英才555工程”领军人才培养计划资助项目 （）
