摘要
采用BEM /FEM耦合技术对某高强化V6柴油机结构的声辐射情况进行了模拟 ,得到了整机辐射声功率、辐射效率、主要部件对声学结果的贡献以及近、远场声压 (级 )、整机外场声强矢量分布等声学结果 ,为该柴油机针对减振降噪的结构声学优化提供了详细信息与重要参考。在此基础上 ,重点对主要声辐射部件—下曲轴箱的结构进行了修改 ,并对修改方案的声辐射情况进行了重计算。主要声学量的对比结果表明 ,在所研究的频率域内 。
Sound field induced by structural vibration of a highly intensified V6 diesel engine was simulated with coupled BEM/FEM method. Acoustic parameters such as the whole engine's radiating acoustic power, radiation efficiency, contributions of main parts to acoustic results, near field and far field sound pressure level, as well as outer field sound intensity vectors were calculated. Under assistance of these results, structural acoustic optimization was conducted on of the diesel's structure, especially the lower crankcase. Results show that the modification could ameliorate the diesel engine's structural sound radiating condition in the studying frequency band.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
2004年第2期155-161,共7页
Transactions of Csice
基金
总装备部"十五"预研项目 ( 4 0 40 2 0 10 1.2 )
