The rotor-active magnetic bearing system subjected to a periodically time-varying stiffness having quadratic and cubic nonlinearities is studied and solved. The multiple time scale technique is applied to solve the nonlinear differential equations governing the system up to the second order approximation. All possible resonance cases are deduced at this approximation and some of them are confirmed by applying the Rung–Kutta method. The main attention is focused on the stability of the steady-state solution near the simultaneous principal resonance and the effects of different parameters on the steady-state response. A comparison is made with the available published work.
Nonlinear Oscillation of a Rotor-AMB System With Time Varying Stiffness and Multi-External Excitations
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Kamel, M., and Bauomy, H. S. (April 22, 2009). "Nonlinear Oscillation of a Rotor-AMB System With Time Varying Stiffness and Multi-External Excitations." ASME. J. Vib. Acoust. June 2009; 131(3): 031009. https://doi.org/10.1115/1.3085884
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