柴油机声源识别试验研究  

Experimental Study on Noise Source Identification of Diesel Engine

作　　者：刘逢春[1] 杨天军[1] 张兴刚[1] 李全[1] 霍君蕊 武海军 

机构地区：[1]中国北方发动机研究所,山西大同037036 [2]大同北方天力增压技术有限公司,山西大同037036

出　　处：《车用发动机》2014年第6期51-54,共4页Vehicle Engine

摘　　要：采用声强试验法进行发动机标定点工况声源识别,定位了发动机噪声贡献特征。结合声压试验法对柴油机全工况进行噪声测试,基于发动机燃烧噪声和机械噪声的产生机理,研究了典型贡献位置对整机噪声的贡献度。研究结果表明:声强贡献面积较大的测量面,对应声压测点位置的噪声也越大;随着发动机转速和负荷的提高,转速对噪声的影响比负荷对噪声的影响更加明显;在发动机高转速工况,旋转部件以及阀类系统对整机噪声贡献较大。The noise source identification at rated operating conditions was conducted with the sound intensity method and the typical engine noise characteristics were determined .Then the engine noise in the whole operating conditions was measured with the sound pressure method .Based on the mechanism of combustion noise and mechanical noise ,the contribution of typical position to engine noise was researched .The result showed that the noise of corresponding sound pressure point to large sound intensity surface was also large .With the increase of speed and load ,the influence of speed on noise surpassed that of load .At high speed ,the contributions of rotary parts and valve system to engine noise were larger .

关 键 词：柴油机 噪声 声源识别 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]