摘要
基于多体动力学(MBD)和弹性流体动力学(EHD)对某汽油发动机主轴承的润滑特性进行研究,利用实验设计(DOE)方法分析了半径间隙、轴承宽度、机油粘度和供油压力等设计变量对主轴承润滑性能,如最小油膜厚度(MOFT)、峰值油膜压力(POFP)、液动摩擦损失(FRIC)和机油端泄流量(Flow)等的影响,并利用Kriging方法建立准确表征主轴承润滑特性的简化模型。结果表明,Kriging可以在较少采样点的情况下建立较准确的主轴承模型。Kriging方法建立的简化模型计算和原始轴承仿真模型相比计算时间大大减少,可用于对轴承的设计优化。
In this paper, the investigation on lubrication characteristics of main bearings in a baseline gasoline engine is conducted using Multi-Body Dynamic （MBD） and ElastoHydrodynamic （EHD）. A Design of Experiment （DOE） method is used to analyze the influence of the design variables, such as radial clearance, bearing width, oil viscosity and supply pressure, on the lubrication characteristics of the main bearings like Minimum Oil Film Thickness （MOFT）, Peak Oil FilmPressure（ POFP）, Hydrodynamic friction power loss （FRIC） and oil outflow （Flow）. Kriging method is then used to establish regression models that can match the lubrication characteristics of the bearing accurately. The results show that an accurate enough model of the main bearing can be established Kriging. The computational cost can be greatly reduced by the regression model, compared to the original EHD model. As a result, this regression model could be used in further study for optimization design of the main bearings.
出处
《机械设计与研究》
CSCD
北大核心
2012年第3期44-50,共7页
Machine Design And Research
