ALGORITHM RESEARCH ON CONTACT PRESSURE AND MAGNITUDE OF INTERFERENCE FOR MULTI-LAYER CYLINDER’S INTERFERENCE FIT

In order to provide theoretical basis for the design of wind turbine’s shrink disk,the calculating formula of contact pressure and magnitude of interference for interference fit of multi-layer cylinder has been deduced based on the displacement expression of thick-walled cylinder under uniform pressure. Two-dimensional axisymmetric model was established by using the finite element software ABAQUS with the dimensions of some type wind turbine’s shrink disk,which was designed based on the calculating formula above,and the dynamically- simulated interference assembly was carried out. The results of contact pressure on the mating surfaces by both methods were discussed,and the errors between the two methods were analyzed. The results show that the results by analytical formulas agree well with those by finite element method and can provide theoretical guidance to the optimization design of wind turbine’s shrink disk.