Abstract

Modal analysis is applied to continuous rotor systems with various boundary conditions which include isotropic and anisotropic natural boundary conditions. The rotor includes the effects of rotary inertia and gyroscopic moment. In particular, the whirl speeds and mode shapes, backward and forward, of a rotating shaft are obtained as spin speed and boundary conditions vary, and the unbalance responses are calculated by using modal analysis. The effects of asymmetry in boundary conditions on the system dynamic characteristics are also investigated.

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