A theoretical model is developed to investigate the effect of Coulomb damping in the sub-foil structure of a foil bearing. Equivalent viscous damping is found for the Coulomb friction. The foil is treated as a continuous perfectly extensible surface on an elastic foundation. The fluid is modeled with the compressible Reynolds equation. A perturbation approach is used to determine the bearing stiffness and damping coefficients from the coupled fluid-structural model. Results are presented for foil bearings with an elastic foundation constructed of a corrugated foil.
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Peng et al. (1994) studied this question.
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