Full floating structure underwater explosion with pulsation and cavitation effect FEM simulation case

Abstract

This paper investigates the response of a floating structure to an underwater explosion, with particular focus on pulsation effects, using Finite Element Method (FEM) simulation. An extensive literature review revealed no accurate numerical studies addressing this specific scenario in peer-reviewed scientific publications. The results of a study on the impact of an initial shock wave on a floating structure, followed by a subsequent bubble shock wave caused by close underwater explosion, were presented. The findings illustrate the immediate effects of an underwater explosion near a floating structure, including the resulting shock wave and structural deformation. The formation of the bubble shock wave from the explosion-generated gas and the consequent deformation of the floating structure is detailed. Additionally, the phenomena such as cavitation that occur following the re-expansion of explosion-generated gas after the bubble shock wave is examined. This study, conducted using LS-DYNA, showcases the software’s comprehensive capability to tackle these issues.