微型客车表面噪声源的识别  

Identification of Minibus's Surface Noise Source

作　　者：罗虹[1] 孙义勇[1] 胡加强[1] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400030

出　　处：《重庆大学学报（自然科学版）》2006年第11期6-9,共4页Journal of Chongqing University

基　　金：重庆市科技攻关项目(2002-6644)

摘　　要：在某微型客车的车外加速噪声控制研究中,运用声强测量原理对某微型客车的表面噪声进行了声强测量,得到了该车的表面辐射噪声的声场分布.综合运用声功率分析方法、声强等高线图分析方法以及频谱分析方法,对其表面辐射噪声进行了声源识别和研究,确定了其主要噪声源是发动机噪声和排气噪声,而车身振动噪声、轮胎噪声、传动系噪声、进气噪声对整车表面辐射噪声的贡献较小.为确定该车车外加速噪声控制的研究重点提供了有效的参考依据.With the study of minbus＇ s accelerated exterior noise control, the principle of sound intensity measurement was applicd, the sound intensity of a minbus＇ s surface noise was tested, and the surface noise distribution was presented. Several identification of noise source methods including sound power,sound intensity contour map, frequency spectrum were used together for surface noise analysis and study. Engine radiation noise and exhaust noise was identified as the major noise sources. On the contrary, car body vibration noise, tyre noise, transmission agent noise, air admission noise just occupied a little proportion of surface sound radiation energy. The research provides the reliable basis to determine main projects of minibus＇ s accelerated exterior noise control.

关 键 词：声强测量 频谱 声源识别 主要噪声源 

分 类 号：U467.12[机械工程—车辆工程] O422.6[交通运输工程—载运工具运用工程]