Fluid-induced instabilities such as whirl and whip are critical self-excited vibration phenomena that challenge the reliability of high-speed rotating machinery. These instabilities arise from the dynamic interaction between the rotor and the circumferential fluid in bearings, seals, or any configuration where two cylinders rotate with fluid in the gap. Whirl typically manifests as a rigid-body forward precession orbit at frequencies near fluid resonance (λΩ) tracking with ma

A steam turbine-generator set was overhauled for about two (2) months before it was attempted to put back to services again. However,...