Free vibration of symmetrically laminated thick-perforated plates

This paper investigates the free vibration of symmetrically laminated, thick, doubly connected plates of arbitrary plate perimeter for the outer boundary and a hole defined by a super-elliptical equation which is able to describe a rectangle, ellipse or quasi-rectangle. The laminated perforated plates can be subject to free, simply supported, or clamped edge conditions. Convergence and comparisons with established work have been studied to ensure accuracy of results. Efforts are made to interpret the frequency results to provide physical insight to the problem.