The Vibration characteristics of stiffened plate with a cutout subjected to in-plane forces are investigated using finite element method. The vibration frequencies and buckling load parameter for various modes of stiffened plate with cutouts having stiffeners varying in numbers and spacing subjected to in-plane loads, have been determined for simply supported and clamped edge conditions. In the structural modeling, the plate and the stiffeners are treated as separate elements where the compatibility between these two types of elements is maintained. The present approach is more flexible than any other finite element modeling in that the mesh division is independent of the location of the stiffeners.
