Analysis of Effects External Pressures and Stiffeners on Vibration of Sandwich Cylindrical Shell Based on Energy Method under Asymmetrical Boundary Conditions

In this paper presents the effects external pressures and stiffeners on vibration of sandwich cylindrical shell based on energy method under asymmetrical boundary conditions. The sandwich shell is formed by three layers where the inner and outer layers are stainless steel and the middle layer is aluminum. The sandwich cylindrical shell equations are established based on first order shear deformation theory (FSDT). The governing equations of motion were employed, using energy functional and by applying the Ritz method. The asymmetrical boundary conditions represented by end conditions of the sandwich cylindrical shell are clamped-free (CF), clamped-simply support (C-SS) and free- simply support (F-SS). The presented results are compared with those available in the literature and great agreement is observed. Finally, the effects asymmetrical boundary conditions, external pressures and stiffeners on vibration of sandwich cylindrical shell are studied.