Nonlinear Coupling Motion Numerical Simulation of Freely Floating Body and Sloshing

摘要

Nonlinear interactions among incident wave, tank-sloshing and freelyrnfloating body coupled motion are investigated. The fully nonlinearrnsloshing and body-surface nonlinear free surface hydrodynamics isrnsimulated using a non-uniform rational B-spline higher-order panelrnmethod (NURBS) in time domain based on the potential theory. Arnrobust and stable improved iterative procedure, iterative semi-implicitrntime integration method for floating bodies (Yan and Ma, 2007) is usedrnfor calculating the time derivative of velocity potential and floatingrnbody motion. An energy dissipation method adopted by Huang (2011)rnis developed to consider flow viscosity effects of sloshing flow inrnliquid tanks. It is observed that the present nonlinear approach can helprnproduce a fair agreement between experimental results (Rognebakkernand Faltinsen, 2003) and those of numerical simulations.