According to the damages of oil-film bearing taper sleeve with elastic cohesion on hot continuous strip mill in some large steel company

3D boundary element method(BEM) for elastoplastic contact problems was used to qualitatively analyze the mechanical behaviors of sleeve and roll neck during the assembly process.The load models of sleeve without and under hydraulic force were respectively built

3D BEM program was developed to simulate the assembly process

the deformed generating line of sleeve under hydraulic force was drawn

and the distribution of contact stress at different stage was obtained.The sleeve structure was revised on the basis of the simulation results.The conclusions could provide beneficial theoretical basis to the further technologies of prolonging bearing service life.