基于波动理论的高速磁浮列车舷窗隔声性能  

Investigation of sound insulation performance of high-speed maglev train porthole based on the wave theory

作　　者：龚胤文 葛剑敏[1] GONG Yinwen;GE Jianmin(School of Physics Science and Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学物理科学与工程学院,上海200092

出　　处：《华中科技大学学报（自然科学版）》2020年第6期57-63,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：“十三五”国家重点研发计划资助项目(2016YFB1200500);中国工程院重大战略咨询项目(2018-ZD-16)。

摘　　要：基于波动理论建立了双层弧度板空腔结构隔声理论模型,对曲率半径影响下舷窗隔声性能进行了计算.计算结果表明:曲率半径变化引起低阶模态移动及环频共振频率变化,从而显著影响舷窗隔声性能;由于受到自身模态影响,板尺寸减小导致"板-空腔-板"共振频率向高频移动;当着重考虑舱内语言清晰性时,应适当加大舷窗空腔厚度及曲率半径;在不改变舷窗结构总质量的情况下,改变双板厚度比例是较好的噪声优化方案.Based on the wave theory,the sound insulation theoretical model of the double-layer curved panel structure was established.The porthole sound insulation under the influence of the radius of curvature was calculated.The calculation results show that the low-order mode movement caused by the change of curvature radius and the change of the ring frequency can significantly affect the sound insulation of the porthole;due to the influence of the panel;s mode,the panel size reduction causes the“plate-cavity-plate”resonance to move to the high frequency;when considering language clarity in the cabin,the porthole cavity thickness and panel curvature radius should be appropriately increased;if the total weight of the porthole structure is not changed,the thickness ratio of the double panel is the better noise optimization solution.

关 键 词：高速列车 舷窗 隔声量 曲率 噪声评价 

分 类 号：U270.16[机械工程—车辆工程] TB533.2[交通运输工程—载运工具运用工程]