用边界元-有限元法研究高架结构辐射噪声  

Analysis of Elevated Structure Radiated Noise with BEM-FEM Method

作　　者：高飞[1] 夏禾[1] 曹艳梅[1] 安宁[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《土木建筑与环境工程》2012年第1期42-46,共5页Journal of Civil,Architectural & Environment Engineering

基　　金：北京市自然科学基金资助项目(8082021);高等学校博士学科点专项科研基金(20090009120021)

摘　　要：高架结构是城市轨道交通的重要部分,其引起的结构辐射噪声问题引起了越来越多的关注。基于边界元Helmholtz积分公式和有限元流固耦合系统理论,推导了结构振动加速度与辐射声压之间的声传递向量,该传递向量可通过单元辐射叠加法求得,结合采用直线电机车辆的北京首都机场快轨线某段高架桥梁段现场试验结果进行了比较分析。结果表明:使用该方法计算的声压结果与实测结果的声压频谱分布及变化趋势吻合较好,该方法可用于城市轨道交通高架结构辐射噪声的预测研究。Urban rail transit is becoming an important means of transportation and elevated structure is one important part of urban rail transit.So the radiation noise induced by elevated structure attracts more and more attention.Based on the theory of Helmholtz integral equation of BEM and fluid-structure coupling system of FEM,the sound pressure transmission vector reflecting the relation between structural vibration acceleration and radiation of sound pressure is derived and solved by the element radiation superposition method.The calculated results are in good agreement with the experimental data from a viaduct section of the Beijing airport rapid rail transit.

关 键 词：轨道交通 高架结构 边界元-有限元法 声传递向量 噪声治理 

分 类 号：U448.21[建筑科学—桥梁与隧道工程] TU112.2[交通运输工程—道路与铁道工程]