Abstract：In this paper, reverse full annular rub of a single disc rotor with nonlinear stiffness is investigated. Comparison of the numerical results and earlier test results shows the necessity to consider the nonlinear stiffness of the shaft in the study of reverse full annular rub. Then, analytical solution of reverse full annular rub is obtained by averaging method and then its stability is discussed by Floquet theory. The results show that besides the dry friction whirl resulting from the change of direction of friction, another reverse full annular rubbing motion caused by the rotor’s nonlinear stiffness and dry friction also exists. And this kind of reverse full annular rub is a stable periodic motion. Finally, influences of parameters on the response of reverse full annular rub and its existence are discussed. The results may provide some references for the design of rotor systems.
2013, Vol. 32 
