Global hydroelastic model for springing and whipping based on a free-surface CFD code (OpenFOAM)

Global hydroelastic model for springing and whipping based on a free-surface CFD code (OpenFOAM)

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ABSTRACT: The theoretical background and a numerical solution procedure for a time domain hydroelastic code are presented in this paper.The code combines a VOF-based free surface flow solver with a flexible body motion solver where the body linear elastic deformation is transpharm online shopping described by a modal superposition of dry mode shapes expressed in a local floating frame of reference.These mode shapes can be obtained from any finite element code.

The floating frame undergoes a pseudo rigid-body motion which allows for a large rigid body translation and rotation and fully preserves the coupling with the local structural deformation.The formulation relies on the ability turbosound ts-18sw700/8a of the flow solver to provide the total fluid action on the body including e.g.

the viscous forces, hydrostatic and hydrodynamic forces, slamming forces and the fluid damping.A numerical simulation of a flexible barge is provided and compared to experiments to show that the VOF-based flow solver has this ability and the code has the potential to predict the global hydroelastic responses accurately.KEY WORDS: Hydroelasticity, Fluid-structure interaction (FSI), Volume of fluid (VOF), CFD, OpenFOAM, Modal superposition.