Dynamic Finite Element Simulation Of Bearing At Service Process

Cylindrical roller bearing, as an important mechanical transmission parts, is widely used in kinds of rotating machinery. With the continuous development of machinery industry, its speed, load, life and design are put forward higher requirements. Therefore, in order to meet the needs of the development of a new generation of advanced machinery and equipment, simulation analysis on the bearing is necessary. Cylindrical roller bearing dynamic finite element simulation combines multi-body contact, sliding, friction, geometric nonlinearity, material nonlinearity and boundary nonlinearity, it is a complicated nonlinear problem.The finite element software ABAQUS was used, cylindrical roller bearing dynamic simulation in its service process was studied step by step. Firstly, contact stress in indentation test and high speed rotating centrifugal stress in circular pan of cylindrical roller was analyzed by ABAQUS/Explicit implement finite program element. The validity of meshing, loading, boundary condition of these two stress analysis was verified by Hertz elastic theory and circular pan centrifugal force analytic method respectively. These preliminary analysis works established the foundation of cylindrical roller bearing3D dynamic finite element model. Then centrifugal force and friction were considered, the geometric model of cylindrical roller bearing was created and it was meshed in sequence. Given the material property, defined the contact, set the boundary conditions and loaded according to actual circumstances, solved the model, finally the simulation results were obtained.The curve of angular velocity, angular displacement and radial displacement of inner and outer circle in the roller was analyzed. Correctness of grid, the load, the boundary conditions of the cylindrical roller bearing in the finite element simulation of dynamic service were identified. The contact stress between roller and inner and outer circle and their Mises stress was analyzed also. The intuitive, quantitative analysis data in the process of dynamic service of the rolling bearing were gotten finally. Results show that the contact stress of contact area at roller and ring is larger, the contact stress of the load rolling body is larger than the no-load rolling body, and roller ends exists stress concentration phenomenon in the bearing motion. During the dynamic service process, there is maximum stress saltation on the bearing parts as modeling time goes on. The maximum equivalent stress of the different part in the bearing from largest to smallest is:rolling element, inner ring, outer ring. This research laid a good foundation for the realization of Multi-Physics Coupling Simulation of the cylindrical roller bearing under actual service conditions.