Accurate simulation method for contact stress of aero-engine bearing

The combination of steady state thermal analysis and dynamic contact mechanics analysis was used to improve the calculation accuracy, and the stress distribution was corrected by thermal analysis, meanwhile the variation characteristics of the bearing were obtained. The research shows that, the maximum dynamic contact stress is located on the bearing ball surface, while the stress of the inner is the minimum. The contact stress of bearing has obvious dynamic response characteristics, while its distribution has a random variation. The contact stress, which increases with the rotational speed and the axial load, is composed of the principal stress and the shear stress.