Vibration Of Stiffened Plates With Cutout Under Concentrated Load

Vibration and buckling characteristics of stiffened plates with cutouts subjected to in-plane concentrated edge loading at the plate boundaries are investigated using the finite element method. The characteristic equations for natural frequencies, buckling loads and their corresponding mode shapes are obtained from the equation of motion. In structure modelling, the plate and the stiffeners are treated as separate elements where the compatibility between these two types of elements is maintained. The effects of cutout sizes and position of in-plane concentrated loads at the plate boundaries upon the buckling load parameter and fundamental frequency of the stiffened plates with cutouts are investigated. Numerical results are presented for a range of hole-to-plate width ratios of 0 to 0.8.