基于CEL算法的发动机润滑液瞬态振荡过程可视化研究  

CEL algorithm-based visualization simulation of the transient oscillation of engine lubricant

作　　者：马子远 俞小莉[1] 黄钰期[1] 刘震涛[1] 黄瑞[1] MA Z-uan;YU Xiaoli;HUANG Yuqi;LIU Zhentao;HUANG Rui(College of Energy Engineering,Zhejiang University,Hangzhou 310000, China)

机构地区：[1]浙江大学能源工程学院,杭州310000

出　　处：《振动与冲击》2018年第1期72-76,97,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金青年基金项目(51206141)

摘　　要：发动机润滑液瞬态振荡过程属于复杂的流固耦合问题,建立了曲轴-油底壳-润滑油流固耦合模型,采用耦合的欧拉-拉格朗日(CEL)算法分析了车辆在启动、加速、制动和转向工况下的润滑油振荡响应,并对瞬态振荡过程进行了可视化,得到各个时刻润滑油的真实振荡情况;对CEL方法的有限元建模、体积分数处理作了分析与探讨,在此基础上对液体震荡情况下油底壳壁面进行了动态响应分析,得到了油底壳应力响应时间历程,结果表明在液体震荡的情况下,油底壳壁面应力曲线会出现尖刺现象,这对整机的NVH性能有很大影响。该结果对发动机设计中如何实现瞬态液体振荡过程的可视化和降低噪声有实际意义。The engine lubricating fluid transient oscillation process is a complex fluid solid coupled problem. A fluid solid coupled model for the crankshaft,oil sump and lubricating oil of a vehicle was established and the transient sloshing responses of the lubricant by using the coupled Euler Lagrange（ CEL） algorithm during the starting,acceleration,braking and steering working conditions were analysed. The finite element modeling and the volume fraction treatment of the CEL method were discussed. On the basis of the case analysis of a liquid shock,the dynamic responses of the oil sump shell were investigated. The results show that under the liquid sloshing conditions, the sharp peak phenomenon will appear on the oil pan wall stress curve,which has a great impact on the NVH performance. The results are of practical significance to realize the visualization of transient liquid oscillation processes and to implement the noise reduction in engine design.

关 键 词：CEL算法 润滑液 振荡过程 可视化 响应 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3