Sandwich structures have found numerous applications in making components of aerospace, military, automotive
industries etc. Catastrophic vibrations have been occurred when these components subjected to dynamic loads. In this paper,
vibration and harmonic behaviours of sandwich plate of two orthotropic composite materials are analyzed using FEM
technique. Sandwich plate made of two face sheet and one core sheet in middle has been modelled using an ANSYS APDL FEM
tool. Effect of side to depth and aspect ratios are demonstrated on vibration and harmonic response of the plate and the related
findings are discussed briefly