Identification of Stiffness and Damping Coefficients of Journal Bearings by Means of the Impact Method

Abstract

It is well knownfrom the preceding chapters, that vibrations of rotors with journal bearings are influenced by the dynamic behaviour of the oil film. Therefore in rotor dynamics investigations oil film characteristics have to be considered. In linear theory the dynamic behaviour of the journal bearings can be described by four stiffness and four damping coefficients. These coefficients can be found either by calculations or by experimental methods.