Shear effects on large amplitude forced vibration of symmetrically laminated rectilinearly orthotropic circular plates

In this paper, nonlinear forced vibration of symmetrically laminated rectilined rectilinearly orthotropic circular plates excited by a harmonic force qocoswt including effects of transverse shear deformation is discussed. The ahalytical solution for the relationship between forcing frequency and amplitude of vibration is obtained by Galerkin 's method . Finally , the paper analyses the effect of the transverse shear on the vibration of the plate and gives the ratio of nonlinear period to linear period to linear period for nonlinear free vibration of the plate.