Comparação de modelos matemáticos para mancais hidrodinâmicos segmentados

Abstract

This work aims to compare the linear and nonlinear hydrodynamic models for tilting-pad bearings. The linear hydrodynamic model uses the finite difference method for the discretization of the Reynolds equation and to determine the pressure distribution in the lubricant film. The hydrodynamic supporting forces applied on the shaft are determined by integrating the pressure on the projected area of the bearing. The nonlinear hydrodynamic model is based on the short bearing consideration, in which the circumferential pressure gradient can be neglected. Thus, the Reynolds equation is simplified allowing the analytical solution of the pressure field and, consequently, of the bearing forces of the bearing.