A Theory of Oil Whip

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Abstract
Oil whip was investigated theoretically and experimentally. In the paper it is shown that the inherent instability of the rotor in previous theories can be avoided by assuming zero pressure in place of negative pressure in the oil film and that the “inertia effect” in occurrences of oil whip can be understood by distinguishing small vibrations and large vibrations of the rotor. It is also shown that oil whip of higher order and the effect of oil viscosity on amplitude of oil whip give possible causes of some peculiar phenomena.

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