Free and forced vibration analysis of stiffened cylindrical shells under moving internal pressure

Cylindrical shells are used tremendously in many engineering fields such as ships, submarines and fuel tank in airplanes. Stiffeners which are beam elements are used for increasing stiffenes of shells. In many cases shells are exposed to dynamic loads. One of dynamic loads in shells is internal moving pressure. Analysis of cylindrical stiffened shells under moving internal pressure are investigated in this research. Equations of motion are based on classic shell theory and derived from Hamilton’s method. Boundary conditions is assumed simply support. Displacement components are assumed Fourie double series based on boundary conditions. Equations of motions are solved by Galerkin weighted functions method for calculation of natural frequency and dynamic response of cylindrical shells under moving internal pressure. Codes in Fortran are used to derive natural frequency and dynamic response of cylindrical shells. Results are compared with other references and Abaqus software. The effect of geometrical parameters on natural frequency and dynamic response of cylindrical shells under moving internal pressure are investigated finally and results for stiffened shells and unstiffened shells with different stiffeners are compared.