Moreover, even if the actual generator has an operating speed of rpm, in order to show the possible different dynamical behaviour of a rotating machine as a consequence of rotor-to-stator rub, it is useful to also present the simulations at a higher rotating speed. With regard to the effect of the original unbalance of the rotor, a general effect is that if it increases then the spiral evolution becomes faster. Comments: To appear in J. Comments: 8 pages and 8 figures with supplementary material. Safronova , V.
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