Nonlinear free vibration of a rotating circular plate under the static load in magnetic field

The nonlinear free vibration of a conductive rotating thin circular plate subjected to static loads in magnetic field was investigated. The nonlinear vibration equations of the motion on a spinning circular thin plate were derived. According to the set of a displacement function, the approximate solution of the static problem and the magneto elastic axisymmetric vibration differential equation of the round plate were obtained through the application of Galerkin integral method. The characteristic formula between nonlinear frequency and amplitude using the static load as a parameter was obtained by the method of multiple scales. According to the numerical calculation, the characteristic curves of the relationship between frequency and the parameter such as the static load, the magnetic induction intensity and the speed of rotation were obtained. The nonlinear vibration characteristics of a spinning plate with clamped boundary condition were described according to the curves drawn by Matlab. We also showed that different parameters (including magnetic induction intensity, static load, time and spinning velocity.) have effect on the frequency of the plate.