Numerical prediction of the frictional losses in sliding bearings during start-stop operation

作     者：Florian KÖNIG Christopher SOUS Georg JACOBS Florian KÖNIG;Christopher SOUS;Georg JACOBS

作者机构：Institute for Machine Elements and Systems EngineeringRheinisch-Westfälische Technische Hochschule Aachen UniversitySchinkelstraße 10Aachen 52062Germany 

出 版 物：《Friction》 (摩擦（英文版）)

年 卷 期：2021年第9卷第3期

页      面：583-597页

核心收录：

学科分类：080703[工学-动力机械及工程] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：This work was funded by the Deutsche Forschungsgemeinschaft(DFG German Research Foundation)-GRK 1856 

主　　题：sliding bearing friction wearing-in contact model,mixed elasto-hydrodynamic simulation 

摘      要：With the increased use of automotive engine start-stop systems,the numerical prediction and reduction of frictional losses in sliding bearings during starting and stopping procedures has become an important *** engineering practice,numerical simulations of sliding bearings in automotive engines are performed with statistical asperity contact models with empirical values for the necessary surface *** aim of this study is to elucidate the applicability of these approaches for the prediction of friction in sliding bearings subjected to start-stop *** this purpose,the friction performance of sliding bearings was investigated in experiments on a test rig and in transient mixed elasto-hydrodynamic simulations in a multi-body simulation environment(mixed-EHL/MBS).In mixed-EHL/MBS,the extended Reynold’s equation with flow factors according to Patir and Cheng has been combined on the one hand with the statistical asperity contact model according to Greenwood and Tripp and on the other hand with the deterministic asperity contact model according to *** detailed comparison of simulation and experimental results clarifies that the application of statistical asperity contact models with empirical values of the necessary inputs leads to large deviations between experiment and *** actual distribution and position of surface roughness,as used in deterministic contact modelling,is necessary for a reliable prediction of the frictional losses in sliding bearings during start-stop operation.