Three-dimensional Elastic Contact Problems Numerical Simulation Technology And Its Applications

Contact problems belong to typical non-linear problems, familiar and specially complicated problems in engineering. It is helpless for classical mathematics and mechanics method to solve contact problems; Resorting numerical compute method is necessary. Due to the development of finite element method and CAE(Computer Aided Engineering) technology based on finite element method, finite element numerical simulation technology has been applied widely. The paper puts emphasis on three-dimensional numerical simulation research for the B7517E conical roller bearing in automotive transmission by comparing computer numerical simulation with classical result. Conical roller bearings are the most important supporting parts in automotive rear bridge, interfered initially.After introducing research & development and basic theory of contact problems, theoretical analysis of finite element numerical solution method is made for contact problems of conical roller bearings in automotive rear bridges. According to synthetical analysis on the feature of parameters, contact pressure & formation and load distribution of conical roller bearings, the limitation is discovered, based on classical solution. Contrarily, numerical simulation & analysis is able to overcome these problems.Special grids is adopted for solid model of conical roller bearings by applying for three-dimensional solid and contact elements, aiming at its characteristic, stress and load distribution of elastic contact problems. Finite element model built in the paper is fit for objective practice, with flexible-flexible contact bodies and surfaces -surfaces contact mode. In term of that, the solution result in two different condition is achieved by ANSYS software.Deep research and comparing analysis between the classical solution and the finite element result is made on contact stress & formation and load distribution of conical roller bearings by revised classical formula of elastic contact problems, according to finite element solution in two different interfering conditions. Thefinial studied outcome and method adopted will bring important effect on engineering application, reliable analysis, optimization design etc. of conical roller bearings, at the same time, certain application value for developing new type of bearings.