Damping Properties of Viscoelastic Laminated Plates with an Unconstrained Fiber-reinforced Layer

Applying the mixed layer wise theories and Ressiner´s mixed variational theorem, the dynamics equations of viscoelastic laminated plates were deduced and the numerical solutions for simple-support laminated plates were derived through Navier solutions. Computing the natural frequency and the loss factor in the plates corresponding to the lower-rank models and analyzing the viscoelastic layer´ influence on the damping properties, the results show that the non-dimensional frequency and the loss factor will increase with higher Young´s modulus of a viscoelastic layer. Using a fiber-reinforced viscoelastic layer has little effect on the non-dimensional frequency, but can effectively improve the damping characteristic and reduce the resonance amplitude of transverse displacement.