Tribodynamic Modelling of High-Speed Rolling Element Bearings in Flexible Multi-Body Environments

This study presents a new flexible dynamic model for drive systems comprising lubricated bearings operating under conditions representative of electrified vehicle powertrains. The multi-physics approach importantly accounts the tribological phenomena at roller–race conjunction and models their effect on shaft-bearing system dynamics. is achieved by embedding non-linear bearing within level model; this something which has not, to authors’ knowledge, been reported hitherto. elastohydrodynamic (EHL) film shown increase contact deflection, leading increased forces total stiffness as rotational speeds increase. Results show that 68 Nm hub motor up 21,000 rpm, input EHL reaches thickness 4.15 μm. lubricant entrainment increases causing non-linearly with speed. contribution leads 16.6% greater rpm when compared conventional dry-bearing modelling methods used in current multi-body software. methodology more accurate response high-speed necessary next generation vehicles.