NONLINEAR DYNAMICS ANALYSIS OF ALUMINUM HONEYCOMB SANDWICH PLATE WITH COMPLETED CLAMPED SUPPORTED

Abstract

Study on the dynamics of aluminum honeycomb sandwich plates of composite structure material plays a key role for the special applications of the aerospace and automotive engineering. The nonlinear dynamics of honeycomb sandwich plate is explored.According to the classical plate theory and the large deformation,the governing equations of motion are established for the honeycomb sandwich plate subjected to the transversal excitation force by using the Hamilton's law of variation principle.The transversal damping is taken into consideration.The method of normalization is utilized to transform the nonlinear vibration equations to nonlinear system with double modes of freedom. Numerical simulation is used directly to investigate the nonlinear responses of the honeycomb sandwich plate.The results indicates that the change of transversal excitation force has a significant effect on the vibration of honeycomb sandwich plate because the hexagon cell of core and the amplitude of the first modal are bigger than the second modal.In the different ranges of transversal excitation force, the honeycomb sandwich plate exists different dynamical phenomena.Single periodic motion appears when the force value is small,and periodic motion,multi-period motion,chaotic motion appears with the increase of force.Experiments are conducted to validate the numerical simulation results.