柴油机表面辐射噪声控制研究  

Radiation Noise Control of Diesel Engine

作　　者：姜绍忠[1] 阎文兵[1] 陈越[1] 温立志[1] 

机构地区：[1]天津职业技术师范大学汽车与交通学院,天津300222

出　　处：《机械与电子》2011年第5期71-73,共3页Machinery & Electronics

摘　　要：为了降低发动机的表面辐射噪声,采用有限元分析方法对原柴油机下曲轴箱和通过添加加强筋方法改进后的下曲轴箱进行了模态计算分析,分别得到其固有频率和模态振型.声功率测算结果表明了方法的有效性.In order to decrease the engine＇s radiation noise,taking the lower crankcase sump as an example,using finite element method,the natural frequency and modal vibration were obtained from the original lower crankcase sump and the improved frame which was added stiffeners.The acoustic power lever result shows that the low crankcase sump with strengthening ribs can decrease the radiation noise effectively.

关 键 词：下曲轴箱 表面辐射噪声 有限元 

分 类 号：TK421.6[动力工程及工程热物理—动力机械及工程]