Abstract
The self-excited vibration of a rotor system induced by joint friction is investigated both theoretically and experimentally. The system is such that two flexibly supported rigid shafts are connected to each other and to the laterally fixed driving and loading shafts by two Kardan joints and one cross-groove (CG) joint. The initial intersecting angle is given to the CG joint. The joint friction of analysis is modeled as Coulomb friction. As the results of investigation, it is found that the analytical stability boundary characteristics correspond to those of the experiments, and the initial intersecting angle has the linear stabilizing effect on the critical friction force. The center joint friction has a stronger effect on the stability than does that of the end joints.
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