Puja Basu Chaudhuri, Anirban Mitra and Sarmila Sahoo
to provide the accessibility of parts of the structures, and also to alter the resonant frequency. Shells with cutout stiffened along the margin are an efficient way to enhance the stiffness of the structure without adding much mass. These stiffeners slightly increase the overall weight of the structure but have positive effect on the structural strength and stability. So to apprehend the laminated composite stiffenedhyparshells with cutout and to use this shell form efficiently, its characteristics under vibration need to be explored comprehensively.