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1 results

  • Damping coefficient estimation of a squeeze-film damperoperating in a dual shaft test rig

  • Claude Gibert, Mikhail Guskov, Lionel Sanchez, Fabrice Thouverez
  • Journal:
    Mechanics & Industry / Volume 11 / Issue 5 / September 2010
    Published online by Cambridge University Press:
    24 December 2010, pp. 297-308
    Print publication:
    September 2010

  • Squeeze film dampers (SFD) are used to reduce dynamical loads in rotating machinery or toimprove their performances in numerous industrial applications. The present paperconsiders the response of a dual shaft system with a SFD mounted on one of its bearings.The study is concerned with the overall system’s dynamics in presence of a sealed SFDbearing with a lateral feeding groove and more specifically with the characterization ofsuch damper in operational conditions. The design characteristics of the SFD are based onthe linear approximation and the optimization w.r.t. sensitivity of appropriate eigenmodesof a numerical model of the dual shaft test rig. In order to gain more insight into theSFD operation, the experimental kinematic and pressure measurements data are processedwithin a numerical model of the fluid film using the short bearing approximation of theReynolds equation and taking into account the flow into the groove. The work holds for lowReynolds number and completely sealed SFD were vapour cavitation is completely absent.