부산대학교 도서관

In this paper, the simultaneous resonance of a ferromagnetic thin plate in a time-varying magnetic field, having axial speed and being subjected to a periodic line load, is studied. Based on the large deflection theory of thin plates and electromagnetic field theory, the nonlinear vibration differential equation of the plate is obtained by using the Hamilton’s principle and the Galerkin method. Then the boundary condition in which the longer opposite sides are clamped and hinged is considered. The dimensionless nonlinear differential equations are solved by using the method of multiple scales, and the analytical solution is given. In addition, the stability analysis is also carried out by using Lyapunov stability theory. Through numerical analysis, the variation curves of system resonance amplitude with frequency tuning parameter, magnetic field strength and external excitation amplitude are obtained. Different parameters that have significant effects on the response of the system, such as the thickness, the axial velocity, the magnetic field intensity, the position, and the frequency of external excitation, are considered and analyzed. The results show that the system has multiple solution regions and obvious nonlinear coupled characteristics.