The Finite Element Analysis Basing On The Contact Problem For Roll Bearing

The contact is a universal mechanics question, as a result of its complexity; it is always a difficult problem to both the engineering and mechanics. Regarding polysome contact, even if it is the elastic smooth contact question, as a result of its boundary non-linearity, it is very difficulty to analysize with numerical method. Just for its universality and complexity, it appears extremely important.In this article taking the attachment polysome contact key question of bearing which is used for some model solid propellant engine as the research background, based on the rolling bearing, applying the non-linear contact question in finite element method, the whole size 3D polysome non-linear finite element analysis under the work load is carried on.As the basis of engineering theory of the Bearings, the mechanics analysis of the Bearing is closely involved in the Bearings' design and application technical. Several main technical factors used to evaluate the practical working states of the Bearing such as capacity to load, fatigue life, tolerance life, deformation and rigidity, vibration and noise should be related to the contact problem. It's a key for the optimization design and reliability analysis of the Bearing to calculate and analyze the partial or entire contact stress and elastic deformation through seeking accurate algorithm approach based on the computer.Static force balancing and Hertz contact theory are adopted to calculate the bearing; however it is difficult to obtain the accurate stiffness value due to the complicated loading of the bearing. In addition Hertz contact theory is only applied to the simple shape and semi-infinite boundary condition. Therefore the penalty method has been adopted here to solve the contact problem with the consideration of large deformation and the friction. The finite element method also has been employed to establish and analyze the bearing model built with ANSYS to estimate the relative displacement of inner and outer ring and bearing stiffness under various boundary conditions.According to Hertz contact theory, its analysis result can be applied to verify the contact model of a steel ball and a plate in numerical techniques. Then the optimum contact analysis model is built for finite element in elementary mesh way to estimate the normal stiffness. The result of this investigation proofs the finite element method is more suitable. Based on the software of ANSYS, the finite element contact model of the bearing 61801 was established. The bearing of contact deform process was numerically simulated with ANSYS. The direction of the stress and strain of the bearing contact was founded. Compared with the results which were calculated by Hertz theory, there were nearly equal. That means the finite element analysis is feasible. And the simulation applied precondition for the dynamic study in theory. Based on which the contact stress and the friction analysist to some solid propellant engine nozzle contacts is carried on, and the result waits to be confirmed furtherly by experiment. The computation and analysis of the contact question to the bearing and this model nozzle attachment place has laid the rationale for the bearing dynamics simulation and the further analysis of attachment contact question to the bearing which is used for some solid propellant engine and made with high performance materiall.