加强筋截面类型对轨道车辆板件结构隔声影响研究  

Study on Effects of Stiffener Section Types on Sound Insulation of Railway Vehicle's Panel Structures

作　　者：詹雪燕 姚丹[2] 张捷[2] 刘冀钊 肖新标[2] ZHAN Xueyan;YAO Dan;ZHANG Jie;LIU Jizhao;XIAO Xinbiao(School of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China;State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China;China Railway Design Group Co.Ltd.,Tianjin 300142,China)

机构地区：[1]西南交通大学地球科学与环境工程学院,成都611756 [2]西南交通大学牵引动力国家重点实验室,成都610031 [3]中国铁路设计集团有限公司,天津300142

出　　处：《噪声与振动控制》2018年第5期113-118,共6页Noise and Vibration Control

基　　金：国家重点研发计划资助项目(2016YFB1200503-02;2016YFB1200506-08);国家自然科学基金资助项目(U1434201;51475);国家科技支撑计划资助项目(2015BAG13B01-03)

摘　　要：针对轨道车辆轻量化设计后可能带来的隔声性能降低问题,研究不同截面加强筋铺设对板件隔声性能的改善效果。基于混合有限元-统计能量分析(Hybrid FE-SEA)方法建立轨道车辆加筋板结构隔声特性预测分析模型,系统分析T型、L型、I型和矩形加强筋截面类型对板件隔声性能的影响。研究结果表明,加筋板的刚度和1阶固有频率皆比均质板大,且随加强筋厚度的增大而增大;当加强筋厚度恒定时,T型加筋板的刚度和1阶固有频率最大,L型加筋板次之;敷设厚度15 mm的加强筋,板件的隔声性能最佳;当加强筋的质量、厚度、腹板面积及尺寸、翼板面积相等时,各类型加筋板的计权隔声量Rw差异不大;板件加筋后,刚度控制区的隔声量增幅3 dB^17 dB,1 250 Hz^4 000 Hz中高频段的隔声量增幅1 d B^6 d B。综合分析可知,以计权隔声量为评价标准时,在加强筋质量、腹板面积、翼板面积及尺寸相等时,敷设厚度15 mm加强筋,板件的隔声性能最佳,Rw较均质板可提高1.4 dB^1.5 dB,而加强筋厚度恒定时,T型和L型加筋板的刚度又最佳。相关研究成果可为轨道车辆板件结构加筋优化提供设计参考。In view of the reduction of sound insulation effects due to the lightweight design of railway vehicles,the influence of different stiffener section types on the sound insulation characteristics is studied.The prediction model of sound insulation characteristics of stiffened plates for railway vehicles is built based on the hybrid finite element method and statistical energy analysis(Hybrid FE-SEA),and the effects of stiffener sections on the sound insulation characteristics of the plate are systematically analyzed.The section types include T-type,L-type,I-type and rectangular type.The results show that the stiffness and the first-order natural frequency of the stiffened plate are larger than that of the homogeneous plate,and increase with the increasing of stiffener thickness.When the stiffener thickness is constant,the stiffness and the first-order natural frequency of the T-type stiffened plate are the largest,and the L-type stiffened plate is the second.Laying the stiffener with 15 mm thickness,the sound insulation performance of the plate is the best.When the mass,thickness,web area and size,flange area of the stiffeners remain the same,there is little difference in the weighted sound transmission loss for various types of stiffened plates.In addition,after the panel is reinforced,the sound insulation in the stiffness control zone is increased by 3 dB-17 dB,and the sound insulation in 1 250 Hz-4 000 Hz frequency bands is increased by 1 dB-6 dB.Comprehensive analysis indicates that with the weighted sound insulation as the evaluation standard,when the stiffener mass,web area,flange area and size keep unchanging,laying 15 mm thick stiffener can reach the best sound insulation performance for the plate,its Rw is 1.4 dB-1.5 dB higher than that of the homogeneous plate.When the stiffener thickness is constant,the stiffness of T-type and L-type stiffened plates is the best.The research results may provide a reference for reinforced optimization design of plates of railway vehicles.

关 键 词：声学 FE-SEA 加强筋 截面类型 加筋板 隔声 

分 类 号：TU112.5[建筑科学—建筑理论] TU112.41