发动机子声源隔声识别法的研究及应用  

Research and Application of Engine Sub-Sound Source Noise-Isolation Identification

作　　者：蔡相儒 魏长生[1] 沈秀奇[1] 顾庆[1] 叶怀汉[1] 袁卫平[1] 

机构地区：[1]上海内燃机研究所,上海200438

出　　处：《内燃机工程》2010年第4期105-108,共4页Chinese Internal Combustion Engine Engineering

摘　　要：以发动机的齿轮室盖为子声源识别的研究实例,在一定的边界条件下,分离出其结构噪声中的结构透射噪声和结构传递噪声,得到了样机齿轮室盖结构透射噪声是主要噪声源的结论,进而通过对其结构透射噪声的控制,达到了整机噪声控制1.4 dB(A)的预期效果。该方法也对隔声/隔振降噪提供了一定的理论基础。The noise-isolation identification method was applied to the engine gear housing cover as an example. In the given boundary conditions, the transmission noise and transfer noise were separated from the structure noise. It is concluded that the transmission noise is the main noise source for the cover. With controlling transmission noise, the engine noise is lowered by expected 1.4 dB（A）. The method also provides a theoretical basis for noise reduction by noise-isolation and vibration-isolation methods.

关 键 词：内燃机 声源识别 子声源 隔声识别法 

分 类 号：TK421.6[动力工程及工程热物理—动力机械及工程]