Rotor-Liquid-Fundament System’s Oscillation

Nonlinear Vibrations of a Rotor-Fluid-Foundation System Supported by Rolling Bearings

“…and(20) into Eq. (21), we obtain, similarly to the derivations in[6] and[12], a set of algebraic equations in the unknowns A, B, C and D. Then, C P iP A P iP D P iP B…”

“…In the case of time-harmonic vibrations of the rotor and foundation, the complex variables z and z 1 can be presented as, see [4] to [12],…”

“…Analysis of experimental data shows that fluid in rotor cavities is often the main cause of unstable regimes [9] and [10]. The underlying physics is that the fluid centrifugal acceleration is opposite to the pressure gradient leading to violation of equilibrium [11] and [12].…”