增压发动机表面辐射噪声识别及分析  

The Identification and Analysis of a Turbocharged Engine Radiated Noise

作　　者：李露露 覃海峰 穆建华 LI Lulu;QIN Haifeng;MU Jianhua(SAIC-GM-Wuling Automobile Co.,Ltd.,TDC,Liuzhou 545007)

机构地区：[1]上汽通用五菱汽车股份有限公司

出　　处：《内燃机》2019年第6期43-47,共5页Internal Combustion Engines

基　　金：广西科技计划资助项目(2016AC02039)

摘　　要：采用发动机表面辐射噪声及其识别方法,对增压发动机进行表面辐射噪声及其主要声源的识别、分析。从表面辐射噪声结果得知,该发动机的声学特性和对整机声功率的贡献受发动机的负荷及辐射面的影响,它的主要噪声包括增压器同步及次同步噪声、缸体辐射噪声、变速器噪声、曲轴振动噪声及空气流动噪声等,对整机噪声提升有较大指导意义。This paper introduced the methods of engine radiated noise recognition,and then analyzed the radiated noise and main sound source for a turbocharged engine.The radiation noise results showed that the acoustic characteristics and overall sound power were influenced by engine performance and its radiated faces.The main noise of the engine included supercharger synchronous and asynchronous noise,block radiation noise,transmission noise,crank shaft vibration and air flow noise,etc.

关 键 词：增压发动机 NVH 辐射噪声 声源识别 

分 类 号：TK417[动力工程及工程热物理—动力机械及工程]