This paper deals with the long term behaviour of flexible rotordynamic systems, which are supported by nonlinear bearings. A system consisting of a rotor and shaft which is supported by one oil jounal bearing is investigated numerically. The shaft is modelled using finite elements and reduced using a Component Mode Synthesis method. Branches of periodic solutions are calculated for three models of the system wich an unbalance ate the rotor. Also self-excited oscillations are calculated for the three models if no mass unbalance is present. The results show that a mass unbalance can stabilize rotordynamic systems and that the first eigenfrequency of the systems has great influence on the self-excited oscillations.
|Title of host publication||Nonlinear and stochastic dynamics : presented at 1994 International Mechanical Engineering Congress and Exhibition, Chicago, Illinois, November 6-11, 1994|
|Place of Publication||New York|
|Publisher||American Society of Mechanical Engineers|
|Publication status||Published - 1994|
|Name||Applied Mechanics. AMD|