✦ LIBER ✦

Modeling the coupled torsional and lateral vibrations of unbalanced rotors

✍ Scribed by B.O. Al-Bedoor

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 455 KB
Volume: 190
Category: Article
ISSN: 0045-7825
DOI: 10.1016/s0045-7825(01)00209-2

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✦ Synopsis

A model for the coupled torsional and lateral vibrations of an unbalanced rotor is developed. The equations of motion, obtained using Lagrangian dynamics, showed inertial coupling and nonlinear interaction between the rotor torsional and lateral vibrations. A softening eect of the rotor torsional stiness has appeared. This eect and some of the nonlinear interaction eects have appeared, for the ®rst time in this model, due to treating the torsional angle as an individual motion. Simulation results showed energetic interaction between the rotor lateral and torsional vibrations. Responses at 1X and 3X in the torsional vibration signal and 1X and 2X in the lateral vibration signals have appeared.

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