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Vibrations of the crosswise stiffened shell, which corresponds to the fuselage of a small passenger airplane, excited by the strike, fallen on the cell center

Project: Visualization of Mechanical Processes
Journal: Visualization of Mechanical Processes: An International Online Journal
Article: ORTHOGONALLY STIFFENED SHELL VIBRATIONS UNDER POINT IMPULSE
Topics: Material Processing, Visualization techniques, Numerical methods, Analytical techniques, Solid Mechanics, Materials

The Movie show numerical simulation of the vibrations of the stiffened and unstiffened closed shells. Parameters of the shell and stiffeners correspond to the light-airplane fuselage with a radius R = 1.3 m, a thickness of aluminum skin of 1.2 mm, a distance between the frames of 0.45 m, and a distance between stringers of 0.145 m. The number of trigonometric vibration forms in the calculation is limited to 224 × 448 in the circumferential and longitudinal directions. All the vibration eigenfunctions with a frequency up to 5 000 Hz are taken into consideration. The tangential inertial terms are taken into account; all the eigenfunctions of longitudinal vibrations are truncated.