油液对油底壳模态的影响分析  

Influence of oil liquid on the oil pan modal

作　　者：郭昂[1] 于洪亮[1] 宋玉超[1] 

机构地区：[1]大连海事大学轮机工程学院,辽宁大连116206

出　　处：《大连海事大学学报》2011年第1期118-120,123,共4页Journal of Dalian Maritime University

摘　　要：针对柴油机湿式油底壳的振动特性问题,以4120s型柴油机为例,采用有限元法对不同充液量的油底壳模态频率和振型特征进行分析,并对存在油液时的油壳系统进行增加加强板的结构改进.结果表明:随着机油量的增加,油底壳模态频率逐渐降低,模态振型也发生了显著变化;形貌优化后的油底壳,固有频率有较大提高,刚度大幅度增加,有利于减振降噪.Aiming at the vibration characteristics of wet oil pan of diesel engine,the finite element method（FEM） was used to analyze the modal frequency and vibration model,and a structure improvement with adding a stiffening plate of oil-pan system of 4120s diesel engine was made.Research results show that the modal frequencies of oil pan decrease gradually with the amount of engine oil increasing,and modal shapes also have noticeable changes.There is a great increase of the inherency frequency and stiffness for the oil pan with topography optimized,which is in faour of both vibration and noise reducing.

关 键 词：模态分析 充液 油底壳 有限元法(FEM) 

分 类 号：TK421.6[动力工程及工程热物理—动力机械及工程]