城轨车辆地板减振降噪分析  

Analysis on vibration and noise reduction of mass transit vehicle floor

作　　者：刘宁[1] 刘厚林[1] 杨国纪[1] 刘晓波[1] 

机构地区：[1]南车株洲电力机车有限公司技术中心,湖南株洲412001

出　　处：《电力机车与城轨车辆》2014年第6期34-35,共2页Electric Locomotives & Mass Transit Vehicles

摘　　要：分析车下噪声在铝合金城轨车辆地板型材中的传播途径;分析自由组合结构损耗因子与模量比、厚度比之间的关系;对地板样件进行了隔声性能测试,试验结果表明该结构地板在全频率范围内都具有良好的隔声性能,隔声量达到40.8 d B。This paper analyzes the transmission route of noise for aluminum alloy floor profile under mass transit vehicle,and presents the relationship among independent assortment structural loss factors and modulus ratio,thickness ratio. Through the sound insulation property test of floor sample piece,the result shows that the floor structure has good sound insulation property in whole frequency range,and the sound transmission loss reaches 40.8 dB.

关 键 词：城轨车辆 地板 减振降噪 

分 类 号：U270.4[机械工程—车辆工程]