高速铁路钢-混结合箱梁桥车致振动与结构噪声预测分析与试验验证  

Prediction analysis and experimental validation of vehicle induced vibration and structure-borne noise of steel-concrete composite box girder of the high-ispeed railway

作　　者：刘潇[1] 张楠[1] 孙琪凯 Liu Xiao;Zhang Nan;Sun Qikai(Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学,北京100044

出　　处：《土木工程学报》2023年第4期41-50,共10页China Civil Engineering Journal

基　　金：中央高校基本科研业务费专项资金资助(2021YJS133);国家自然科学基金(52178101)。

摘　　要：为了高效、快速地进行钢-混结合箱梁车致振动与结构噪声的预测,基于虚拟激励法-辛方法(PEM-SM),将轨道不平顺作为平稳性的随机激励,轨道结构视为无限长的周期性子结构,在频域内求解轨道系统的动力响应,建立有限元-边界元(FE-BEM)、统计能量(SEA)混合预测模型。将一32m高速铁路钢-混结合箱梁声振试验结果作为依据,验证所提方法与预测模型的有效性。分析结果表明:桥梁总振级和总声压级整体随着列车速度的增加而增大;钢梁腹板的总振级和总声压级均大于钢梁上翼缘和底板,腹板也是主要的声辐射构件。To efficiently predict the vibration and structure-borne noise caused by steel-concrete composite box girder,based on the pseudo excitation method-symplectic method(PEM-SM),the track irregularity is regarded as the random excitation of stationarity,and the track structure is regarded as an infinite periodic substructure.The dynamic response of the track system is solved in the frequency domain.The composite model composed of finite element-boundary element(FE-BEM)and statistical energy analysis(SEA)model is established.Based on the acoustic vibration test results of a 32 m high-speed railway steel-concrete composite box girder,the effectiveness of the proposed method and prediction model is verified.The results show that the total vibration level and total sound pressure level of the bridge increase with the increase of train speed.The total vibration level and total sound pressure level of the web are greater than those of the flange plate and bottom plate,and the web is also the main sound radiation component.

关 键 词：钢-混结合箱梁 振动与结构噪声 虚拟激励法-辛方法 频域分析 

分 类 号：U441.3[建筑科学—桥梁与隧道工程] U24[交通运输工程—道路与铁道工程]