A nonlinear dynamic mathematical model of high speed cylindrical roller bearing was presented.Newton-Raphson method was used to solve the model

and the dynamic performance parameters of roller bearing were obtained.Under different radial loads

the variations of the rollers rotational speeds were discussed.The distributions of minimum oil-film thicknesses and contact loads between rollers and raceways were obtained.The results show that the number of loaded rollers increases with the increasing radial load at certain speed

and smaller radial load could lead to serious slippage and lower rotational speeds of rollers in loading region.The minimum oil-film thickness between each roller and inner raceway is thinner than that between each roller and outer raceway in loading region.By comparing with the results of a calculation example of large-scale analysis software “SHABERTH” and verification test

it shows that the analysis method on dynamic characteristics of high speed cylindrical roller bearing in this paper is not only accurate and reliable

but also simple and suitable to engineering applications.