Shells (Engineering) Cylinders 3 Vibration 3 Mathematical models 2 Structural analysis (Engineering) 2 Structural stability 2 Testing 2 Buckling (Mechanics) 1 Concrete construction 1 Design and construction 1 Finite element method 1 Lagrangian functions 1 Models 1 Plates (Engineering) 1 Roofs, Shell 1 Structural dynamics 1