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QUASI-PERIODIC RESPONSE AND STABILITY ANALYSIS FOR A NON-LINEAR JEFFCOTT ROTOR

✍ Scribed by Y.-B. Kim; S.T. Noah

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
514 KB
Volume
190
Category
Article
ISSN
0022-460X

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✦ Synopsis

A modified HBM (Harmonic Balance Method) -AFT (Alternating Frequency Time) method is developed to obtain quasi-periodic responses of a horizontal Jeffcott rotor with a bearing clearance. Two truncated double harmonic expansions are used for calculating accurate quasi-periodic responses. The winding number, which is created as an unknown period occurring due to cross-coupling force terms in the non-linear rotor system, is obtained by applying the FFT algorithm. The stability analysis is performed with only input frequency (rotational speed), which reveals rich dynamical characteristics in a non-linear Jeffcott rotor for quasi-periodic motion.

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