Multi-level dynamic responses of blast-loaded orthogrid stiffened panels

Abstract

In this study, the multi-level dynamic responses of the blast-loaded orthogrid stiffened panel (BOSP) is analyzed using the energy method. The dynamic response of the area of panel enclosed by the stiffeners can be considered as the combination of the overall deformation of the neural surface and the local deformation relative to the neural surface. The relevant vibration amplitude is calculated through the Lagrange principle. The theory is verified by the finite element method (FEM). Parametric analysis reveals the effect of the thickness of the panel and stiffener distribution on the dynamic response of BOSP, including the deformation mode and maximum deflection. The anti-explosion theory of BOSP can help effectively predict the deflection, which can guide the ultra-lightweight design of BOSP.