The study of the non-linear dynamic response for circular plate subjected underwater impulsive loading

In this paper, the non-linear dynamic response of circular air-backed panel subjected to underwater impulsive loading has been studied in the fluid-structure interaction (FSI) experiments. This is helpful for the design and improvement of thin plate structures in practical engineering field. Three typical copper plates, (a) clamped, and (b) bolted were selected, fixed on the end of the anvil tube by the flange ring cover. A high-speed photography system recorded the full-field shape and displacement profiles of the specimens in real time. The pressure history of the underwater impulsive wave was measured by a pair of dynamic pressure transducers. The 3D transient deformation fields’ measurements were obtained using a 3D digital image correlation (DIC) technique. Strain results from DIC and the strain gauges technique were in good agreement. The results also show a high level of correlation with that results simulated by AUTODYN. The 3D-DIC is proven to be an effective method to measure 3D full-field dynamic response of structures under underwater impact loading. Moreover, this work will be helpful on understanding the failure process and predicting the modes.