INFLUENCE OF OIL-SQUEEZE-FILM DAMPING ON STEADY STATE RESPONSE OF FLEXIBLE ROTOR OPERATING TO SUPERCRITICAL SPEEDS

摘要

Experimental data were obtained for the unbalance response of a flexible rotor to speeds above the third lateral bending critical. Squeeze-film damping coefficients calculated from measured data showed good agreement with short-journal-bearing approximations over a frequency range from 5000 to 31 000 cpm. Response of a rotor to varying amounts of unbalance was investigated. A very lightly damped rotor was compared with one where oilsqueeze dampers were applied.