Abstract
In this study, the simulation model presented and validated in a previous study, Link-Spring model, is used to describe the foil structure of bump-type foil bearing. A theoretical analysis is presented to investigate the nonlinear dynamic behavior, i.e., the stability and unbalance response of bump-type foil bearings. The trajectory of shaft is simulated with the iteration calculation of shaft motion equation at each time step, which is coupled with the Reynolds' equation and the foil structure model. Parametric studies of number of bump, size of bump, thickness of foil and material of foil are presented based on the bearing load prediction and the nonlinear orbit simulations.
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