Rotor is a mandatory element of most turbomachines. With development of technologies in the mechanical engineering, a need arose for quantitative and qualitative assessment of the rotor system behavior during acceleration, which in turn is accompanied by passing through the system resonance. This paper considers methods for describing large turns using the Euler vector and the Zhilin tensor. The rotor method of describing large turns was tested using the example of a problem involving a rotor accelerating under the external torque influence. The considered system included rigid and weightless shaft, disk installed with the eccentricity and combined support with spherical joint and corner springs. It is shown that when resonance appears during the rotor acceleration, part of the rotational energy is converted into the transverse vibration energy, which leads to a decrease in the rotor rotation speed and an increase in the transverse vibration amplitude. This effect of dragging the rotor into resonance is most dangerous at the low rotor torques, since it takes much more time to pass the resonance, and the risk of rotor failure also increases as a result of the growing vibration amplitude. The proposed method for calculating the rotor system dynamics is recommended in developing the rotor acceleration algorithms, which are used when writing programs for the automated control systems.

EDN YYFBLZ