NON-LINEAR PERFORMANCE OF A THREE-BEARING ROTOR INCORPORATING A SQUEEZE-FILM DAMPER

摘要

This paper is concerned with the non-linear vibration performance of a rigid rotor supported on three bearings, one being surrounded by a squeeze-film damper. This damper relies on the pressure built up in the squeeze film to help counteract external forces arising from unbalance and other effects. As a result a vibration orbit of a certain magnitude results. Such vibration orbits illustrate features found in other non-linear systems, in particular sub-harmonic resonances and jump phenomena. Comparisons between theoretical predictions and experimental observations of these phenomena are made.