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.
出处
《机械与电子》
2011年第5期71-73,共3页
Machinery & Electronics
关键词
下曲轴箱
表面辐射噪声
有限元
lower crankcase sump
radiation noise
finite element method
