Free vibration of symmetrically laminated thick-perforated plates

This paper investigates the free vibration of symmetrically laminated, thic k, doubly connected plates of arbitray plate perimeter for the outer bounda ry and a hole defined by a super-elliptical equation which is able to descr ibe a rectangle, ellipse or quasi-rectangle, The laminated perforated plate s can be subject to free, simply supported, or clamped edge conditions. Con vergence 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. (C) 2000 Academic Press.