Effects of eccentric phase difference between two discs on oil-film instability in a rotorbearing system
Oil-film instability rule is obtained under eccentric phase differences. Complicated combination frequency components appear under oil-film instability. The Second mode whip is excited under the larger eccentric phase difference. The instability threshold increases with the increase of eccentric phase differences. The transfer of the self-excited vibration energy is analyzed.
eccentric phase difference oil-film instability combination frequency a rotor system the first/second mode whip