Free Vibration Analysis of circular plates with holes and cutouts

Abstract

Circular plates with holes are extensively used in mechanical components. The existence of a hole in a circular plate results in a significant change in the natural frequencies and mode shapes of the structure. Especially if the hole is located eccentrically, the vibration behavior of these structures is expected to deviate significantly from that of a plate with a concentric hole. These holes usually cause the change of natural frequency as well as the decrease of load carrying capacity. It is important to comprehend the associated effects in the work of mechanical design or flight control of the structure. Therefore, in this study, an experimental method to determine the modal characteristics of a plate with multiple holes and slots are used is verified by the finite element analysis (FEA) with ANSYS. Also, the relationship between parameter variations and vibration modes is investigated. These results can be used as guidance for the modal analysis and damage detection of a circular plate with a hole.