Based on the fundamental equation and four kinds of boundary conditions,large amplitude vibration of circular sandwich plate under uniform load, is investigated.

The differential equations of the axisymmetric large amplitude free vibration for circular sandwich plates under static load are derived, and a set of nonlinearly coupled algebraic and differential eigenvalue equations of the problem are formulated following an assumed time mode approach suggested.

Based on the fundamental equation and four kinds of boundary conditions of large-amplitude vibration of circular sandwich plate under uniform load, separate variables of time and space are assumed in solving for the dynamical deflection, and the stress and rotation angle in the forms of deflection function are formulated by the hypothesis of the space mode and the variational method.

Based on von Karman plate theory,the issue about nonlinear vibration for circular sandwich plates under circumjacent load with the loosely clamped boundary condition is researched.

The nonlinear bend and the large amplitude free vibration for circular sandwich plate under uniformed loading and circumjacent loading is researched firstly.

Dynamics interaction analysis between laminated circular plate and infinite layer foundation;

Employing the partition region model and appling the plate theory and nonlinear mechanics ,the nonlinear differential governing equations of delaminated circular plate are built.

In the nonlinear bending theory of circular sandwich plates, nonlinear bending ofthe plates under the action of axisymmetric uniformly distributed line load is adifficult problem.