engleski

Comparison of a Different Implicit Time-integration Methods for the Numerical Solving of Contact Problem of the Rotor in Two Dry Friction Bearings

In the paper the determination of transient nonlinear multidisc rotor response, whirling with slip on the vibrating stator, is shown. Some results and experiences in using HHT alpha, WBZ alpha and generalized alpha method, for numerical obtaining of response of run-down rotor during the contact with vibrating stator in the dry friction bearings, are given. The numerical stability, and accuracy of these methods is compared. Special attention is paid to the possibility of using the adaptive time step calculation. Results of calculations, in the form of rotor displacement amplitudes in horizontal and vertical directions as well in the form of whirl orbits is compared with experimental results obtained on the test rig.

Rotordynamics; Generalized alpha method; Adaptive time step; Dry friction bearings

nije evidentirano