Hydroelastic impact of stern structure using CFD and FEA

This paper presents the results of the structural response due to slamming in the stern region of the Joint High Speed Sealift (JHSS) vessel. A slamming event is identified by performing rigid-body large-amplitude seakeeping simulations using the LAMP program. The event is characterized by the relative motion between the free-surface and hull at a specific point near the stern of the vessel. The structure is developed using ABS and other conventional design guidelines, and it is analyzed using the commercial FEA software ABAQUS. The stress of the fluid on the structure is obtained by using a computational fluid dynamics (CFD) solver built on the open source CFD Library OpenFOAM. The fluid stress is applied to the modal model of the structure using a robust and flexible grid-matching routine. Finally, the structural response is determined in the time domain by solving the system of modal equations of motion.