柴油机油底壳声液振耦合系统噪声模态研究  

Study on Diesel Engine’s Oil Pan’s Modal of AcousticLiquid-Vibration Coupling System of Noise

作　　者：胡启国[1] 李力克[1] 陈万德 

机构地区：[1]重庆交通大学机电与汽车工程学院,重庆400074 [2]川庆钻探工程公司安检院泸州环监所,泸州6460001

出　　处：《武汉理工大学学报（交通科学与工程版）》2013年第1期53-57,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：中国石油集团科技项目资助(批准号:AJ-11-16)

摘　　要：针对柴油机油底壳噪声分析中只分析壳体振动而忽略了润滑液和空腔影响,利用声液振耦合有限元理论,建立油底壳结构有限元模型,润滑油、内部空腔声学有限元模型,油底壳声液振耦合系统有限元模型,并对各有限元模型进行模态研究,然后对实际油底壳振动频谱特性进行验证分析.通过研究得到油底壳在声液振耦合系统模态下振动和噪声值明显增强,特别是在118.26Hz强耦合模态频率下.油底壳中润滑液在低频时对声液振耦合系统影响较小,在高频时对系统影响较为明显.Noise analysis for the diesel engine oil pan casing vibration analysis only and ignore the lubri- cating fluid and cavity effects. The use of acoustic-liquid-vibration coupling finite element theory, cou- pling system element model is established of oil pan, oil and internal cavity of oil pan, and the modal of the finite element is analysised, then the vibration frequency of the oil pan is measured and analy- sised. Research oil pan system in the acoustic fluid coupled vibration mode was significantly lower vi- bration and noise enhancement, especially in the strong coupling 118.26 Hz modal frequencies. Lubri- cating fluid in the oil pan when the low-frequency sound vibration coupled system is less liquid, at high frequencies is more significant impact on the system.

关 键 词：油底壳 声液振耦合 模态分析 降噪 

分 类 号：U464.2[机械工程—车辆工程]