Abstract
The dynamic instability of a rotor-bearing system with two asymmetric disks is studied, to show how the interactions between the two parametric excitations with various phasing and amplitude affect the unstable behavior of the system. The FE model of the asymmetric rotor-bearing-disk system is established. The Bolotin’s method and discrete state transition matrix (DSTM) method are introduced for determining instability regions. Then, for an actual rotor-bearing system, both the primary and combination instability regions are obtained, respectively. The effects of relative inertia asymmetry, inertia asymmetric angle, rotating speed and damping upon the instability regions are analyzed in detail.
Published Version
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