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- W2351892017 abstract "Considering backlash of gcar pairs and radial clearance of bearings,time-varying mesh stiffness and time-varying bearing stiffness were derived.Mass,stiffness and damping matrices of a system were obtained by using the finite element method,then they are assembled with the integrating method.Nonlinear dynamic model of a geared flexible rotor-bedring system was established under complex loads.Using the modified FPA method to determine the solution period,using Runge-Kutta method and Newton-Raphson method to solve nonlinear dynamic equations,then the largest Lyapunov index was obtained to determine the dynamical behavior of the system.The dynamic equations were simalated numerically and the effects of rotational speed,backlash,shaft stiffness,bearing radial clearance on the nonlinear dynamic behavior of the system were studied.The results showed that tooth off and bilateral impact phenomenon occur with increase in backlash,and the quasi-periodic motion changes into a chaotic motion around the critical speed;with decrease in shaft stiffness,the bending-torsion coupled vibration critical speed decreases,the gear teeth off and the vibration amplitude also decrease;when the radial clearance increases,the effects of nonlinear vibration of bearing on the system increase and the excitation amplitude of bearing varying stiffness increases." @default.
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- W2351892017 date "2013-01-01" @default.
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- W2351892017 title "Nonlinear dynamic analysis for a geared flexible rotor system considering multi-clearance" @default.
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