Abstract: When a rotor, excited by unbalance, is operating eccentrically within a clearance and in local contact with the stator it behaves as a bilinear oscillator with a natural periodic motion that ...

Abstract: It is now widely recognized that destabilizing forces, tending to generate forward rotor whirl, are generated in axial flow turbines as a result of the nonuniform torque induced by the nonuniform ...

Abstract: In a previous paper (Ehrich, 1994), the author has cataloged a variety of unique rotordynamic responses which have been observed in a computer model of a simple Jeffcott rotor in a nonlinear ...

Abstract: Labyrinth seals and associated structural elements have been noted to sustain fatigue failure in high powered, high speed rotating machinery under circumstances that preclude blaming standing wave ...

Abstract: Several observations have been made in the Fourier spectra of high speed rotor-dynamic response of uniformly spaced frequency spikes on either side of key synchronous or subharmonic or superharmonic ...