NONLINEAR VIBRATIONS OF THE "ROTOR – JOURNAL BEARINGS" SYSTEM

The equations of motion a rotor system mounted on journal bearings with non-linear characteristic are solved by high-precision analytical methods. A new technique has been developed for solving nonlinear differential systems bearings, taking into account nonlinearity reaction forces the lubricating layer. Algebraic were obtained that allow us to determine amplitudes oscillations and supports, construct amplitude-frequency characteristics varying parameters rotor, supports fluid depending angular velocity rotor. conditions frequency intervals presence self-oscillations determined. obtained, bearings. optimal size gap oil film, mass fluids used as layer in bearing, rigidity damping coefficients, at which magnitudes self-excited have values, obtained.