FREE VIBRATION OF SYMMETRICALLY LAMINATED ORTHOTROPIC PLATES

With the advent of the widespread use of fiber-reinforced composite materials, the natural frequencies and mode shapes of laminated plates has been widened int, rest, However, there are stretching-bending and bending-twisting coupling-as well as shear deformation in laminated plates due to the orientation of the plies and stacking sequence, so it is difficult to get anaolytical solutions of many dynamic problems in engineering.Therefore, a numerical method of both simplicity and accuracy must be sought to meet the needs for engineering counting.