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Finite length bearings and squeeze-film dampers: A two-dimensional dynamical solution

Author(s): J. Antunes, M. Moreira & P. Piteau Abstract: In this paper we develop a non-linear dynamical solution for finite length bearings and squeeze-film dampers based on a Spectral-Galerkin method. In this approach the gap-averaged pressure is approximated, in the lubrication Reynolds equation, by a truncated double Fourier series. The Galerkin method, applied over the residuals so obtained, generate a set of simultaneous algebraic equations for the time-dependent coefficients of the double Fourier series for the pressure. In order to assert the validity of our 2D-Spectral-Galerkin solution we present some preliminary comparative numerical simulations, which display satisfactory results up to eccentricities of about 0.9 of the reduced fluid gap HIR. The so-called long and short-be... Pages: 10 Size: 322 kb Paper DOI: 10.2495/CMEM030421

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