Abstract
The stiffened panels of marine structures are usually suffered from various dynamic loads. However, there are very few reports about the dynamic buckling experiment for stiffened panels. In this paper, stiffened panels are designed to carry out a series of impact experiments on a falling hammer platform. The high-speed deflection fields during the extremely short impact time are recorded using 3D-DIC (Digital Image Correlation) system in these experiments. Thus, the dynamic deflections are acquired to analyze the dynamic buckling behavior for stiffened panels. Based on the experiment results, the application of dynamic buckling criteria is studied to determine the critical impact velocity for the experiment models. At last, the FE simulation is used to compare with the experiment results of dynamic response for stiffened panels, and the influence of initial imperfection modes are also discussed. The analysis results show that, the stiffened panels tend to have dynamic bucking modes with more half-waves of deformation in longitudinal direction, and the dynamic response can be significantly influenced by the initial imperfection modes.
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