预测与降低柴油机油底壳辐射噪声方法的研究.pdf

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汽车工程
2006年(第 28卷)第 7期 Automotive Engineering 2006 (Vol. 28) No. 7
2006153
预测与降低柴油机油底壳辐射噪声方法的研究
郭磊 1 ,郝志勇 1 ,贾维新 1 ,刘宏 2
(1 浙江大学机械与能源工程学院,杭州 310027; 2 杭州汽车发动机厂技术中心,杭州 310005)
[摘要] 介绍了一种针对车用柴油机油底壳辐射噪声预测和降低的方法,通过有限元/边界元法预测油底壳
结构的动态特性、频响特性以及辐射声功率级,同时考虑油底壳中润滑油的流固耦合作用,提出在油底壳上布置加
强板和使用复合材料的方法降低该油底壳的辐射噪声声功率级。
关键词:油底壳,辐射噪声,有限元/边界元法,流固耦合
A Research on Prediction and Reduction of Radiated
Noise from O il Pan of D iesel Engine
Guo L e i1 , Hao Zh iyong1 , J ia W e ix in1 & L iu Hong2
1 College of M echanical and Energy Engineering, Zhejiang University, Hangzhou 310027;
2 Technique Center of Hangzhou Engine Factory, Hangzhou 310005
[ Abstract] An efficient method to p redict and reduce the radiated noise from the oil pan of a diesel engine
is p resented. The dynam ic characteristic, frequency response characteristic and radiated sound power level of origi
nal oil pan is p redicted by FEM /BEM with consideration of the fluid / structure interaction between oil and pan. Two
countermeasures of adding strengthening ribs and posite material are p roposed, which effectively lower the
radiated sound power level of oil pan.
Keywords: O il pan, Rad ia ted no ise, FEM /BEM , Flu id structure coupling
中的润滑油与油底壳相互作用会对结构的动态特性
1 前言及声学特性产生影响[ 5 ] , 运用有限元/边界元法
( FEM /BEM )进行分析时应该考虑这个因素,从而
在发动机的辐射噪声中,结构薄壁件(包括油得到精确的结果。对于润滑油的模拟,文献[ 6 ]运
底壳、气门