Effects on Natural frequency of Simply Supported Square Plate due to concentrated masses and Circular Cutout

Abstract

In any operation performed by machine on any structure vibration may occur. This vibration can be devastating when the frequency matches with the natural frequency of that structure. Due to resonance the structure can be failed permanently. So it is always desired to reduce the vibration of the structure or maintain a low level. The natural frequency of a simply supported square plate can be modified by making cutout in the plate or by placing concentrated mass on the plate. In this project, our aim is to devise a way of predicting natural frequency for a simply supported square plate. To do that, we analyze vibration characteristics of a simply supported square plate by using ANSYS MECHANICAL APDL 14.0. Vibration characteristics is investigated by analyzing modal and harmonic analysis for the simply supported square plate. Then the analysis is done due to presence of cutout and concentrated mass. The position of cutout and concentrated masses are also an important factor for the vibration characteristics of the plate. By changing the position of cutout and concentrated masses our investigation is also performed.