Hollow cylindrical and truncated conical shells depict enhanced torsional shear resistance compared to beams plates are ubiquitously used in structures aeronautics, submarines, wind turbines, pressure vessels, transmission pylons. Upon extensive localised blast, these elements undergo local global deformation failure. The detrimental damage the shell depends on stand-off charge mass is proporti...

In engineering applications, especially in the field of modern military defence, the cylindrical shells, conical shells and coupled conical-cylindrical shells are basically simplified models of many types of weapons and equipment, such as aircraft, missiles, and submarines. The study of free vibrational characteristics of cylindrical shells is comprehensive. Initially, researchers1-5 investigat...