2002•Journal of Central South University of Technology(Natural Science)Requires access
Nonlinear model of rotor system with loose fault
Duang Ji
Open publisher page 2 citations
Abstract
A nonlinear model of rotor system with loose fault is established. It takes into account both the nonlinear caused by subsection of the stiffness of the rotor system with loose fault and the impacting excitation caused by the clearance when loose fault exists. The loose fault vibration phenomena calculated by this model is in agreement with the experiment measurement results very well because the model can simulate both the high harmonic and sub harmonic vibrations of the system, while broken line linear which hasn′t impacting action system only displays sub harmonic response. The calculated results of the model show that impacting excitation causes the high harmonic vibrations of the rotor system with loosened faults and that the response amplitude is in direct proportion to the amplitude of impacting force. It also shows that damping has small influence on vibration response of the loose fault system.