The knowledge of linearized dynamic coefficients of bearings is very important in rotor dynamics especially for investigating the stability of the system. This paper discusses the techniques in use for the reduction of the dynamic coefficients of tilting-pad bearings to the eight ordinary ones, deriving from the assumption of synchronous vibration of pads which cannot be applied to the classsical stability analysis. A reducing technique that doesn't need such assumption is proposed, obtaining constant coefficients which can be used for a correct stability investigation in a given frequency range. The results obtained with the different approaches are compared. The characteristics of a test rig designed for the identification of bearings is presented together with experimental results.
Identification of tilting-pad bearings
FORTE, PAOLA;
1995-01-01
Abstract
The knowledge of linearized dynamic coefficients of bearings is very important in rotor dynamics especially for investigating the stability of the system. This paper discusses the techniques in use for the reduction of the dynamic coefficients of tilting-pad bearings to the eight ordinary ones, deriving from the assumption of synchronous vibration of pads which cannot be applied to the classsical stability analysis. A reducing technique that doesn't need such assumption is proposed, obtaining constant coefficients which can be used for a correct stability investigation in a given frequency range. The results obtained with the different approaches are compared. The characteristics of a test rig designed for the identification of bearings is presented together with experimental results.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
