Analytical Study of Aerodynamic Foil Journal Bearing with Elastic Support

Abstract

A new type of compliant foil bearing (CFB)-Aerodynamic Foil Journal Bearing with Elastic Support was developed and analyzed in this paper. Sets of physical models were proposed to solve the Elastohydrodynamic (EHD) coupling problem for this new type of CFB. The characteristics of compliant foil supported by elastic foundation were studied. The transient compressible Reynolds' equation was adopted while considering the nonlinear dynamic force of the gas film. The theoretical methods of obtaining the static and dynamic parameters of the bearing-rotor system were deduced. Finite Element Method (FEM) was used in order to solve the elastic foundation deformation and CFB's governing equations.