Abstract
An analysis is made of the whirling performance of an elastic rotor supported in fluid lubricated journal bearings, taking account of both the displacement and velocity-dependent components of dynamic bearing action. It is shown that two distinct modes of vibration occur corresponding roughly to half-speed whirling, oil whip, etc., and to reduced elastic whirling speed respectively. Typical bearing coefficients are given for short journal bearings. Using these, examples are given illustrating the calculation of the natural frequencies of a rotor running at a fixed speed and the calculation of the response curve of a rotor running through a range of speeds. Experimental evidence confirming these results is given
The inherent stability of an elastic rotor bearing system is also investigated and a chart presented showing the limits of stable operation of an elastic rotor
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