Lyu, S; Huang, L; Thomas, G; (2019) Motions of a Floating Body Induced by Rogue Waves. In: Proceedings of 14th OpenFOAM Workshop. OpenCFD Limited: Duisburg, Germany.

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Abstract

Rogue waves are short-lived large amplitude irregular waves that randomly occur in oceans and significantly affect the safety of marine structures. Most past research has focused on the formation of rogue waves and their interaction with fixed marine structures; in contrast, research on their interactions with freely floating structures is somewhat lacking. This paper outlines work conducted to simulate the motions of a floating structure induced by rogue waves based on OpenFOAM. Code development has included the generation of a rogue wave group and its incorporation with the overset mesh technique to allow a large displacement of the structure. Validation of the developed code has been conducted through comparing the motions of a floating body in regular waves with existing experimental data. Investigations were then performed on the motions of the same floating body with different degrees of freedom induced by rogue waves. The behaviour of the floating body is analysed in detail; for example, the sway, heave and the persistent roll motions after the wave has hit the structure. In addition, the numerical results of forces and moments of the moving body are compared with their fixed counterparts

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