地铁铝合金车辆的车内噪声控制及噪声响度评价  

Interior Noise Control and Loudness Evaluation for Metro Aluminum Alloy Vehicle

作　　者：耿烽[1,2] 左言言[1] 

机构地区：[1]江苏大学振动噪声研究所,江苏镇江212013 [2]南京工程学院车辆工程系,江苏南京211167

出　　处：《中国铁道科学》2011年第6期114-118,共5页China Railway Science

基　　金：江苏省自然科学基金资助项目(BK2009212)

摘　　要：根据地铁A型铝合金车辆的车体结构建立车内声场计算模型,利用声传递向量技术进行噪声源分析。结果表明:车体地板中部区域、车顶中部区域以及右侧墙中部附近区域对车内声学的贡献较大,是车内的主要噪声源。在增加这些区域车体的壁板厚度后,车内的噪声得到明显地控制。利用Zwicker法对车内噪声响度的计算结果表明:车体壁板增厚后,降低的噪声主要集中在100Hz频段以下,而在人耳更为敏感的150～350Hz频段上,噪声的降低幅度相对较小。Based on the car body structure of metro A-type aluminum alloy vehicle,the calculation model of coach interior sound field was set up,and the noise source was analyzed by acoustic transfer vector method.The results show that the nearby middle area of the floor,the roof and the right side wall of the car body structure are the main noise sources which have greater acoustic contribution to the interior noise.After the panel＇s thickness of these areas being increased,the interior noise was significantly controlled.The corresponding noise loudness was calculated by Zwicker method.The result shows that,after the panel＇s thickness of car body being increased,the reduced noise mainly concentrates below 100 Hz.While the noise attenuation is relatively weak in 150~350 Hz band which is more sensitive to human.

关 键 词：地铁车辆 铝合金车体 车内噪声 响度 

分 类 号：U270.16[机械工程—车辆工程]