It is well recognized that a variety of phenomena in ship motions in waves like peak bending, bifurcations, ultra/subharmonic states, biased oscillations, hog/sag and even capsize derive from a fully nonlinear interaction of the floating object with the environment. Structural integrity, safety, comfort and operatively levels are immediate consequences of the floating object response. In most cases the dynamics and the fluid dynamics involved are very complex ones and unfortunately the related mathematical models are very complex too. Time domain simulations of nonlinear motions of two-dimensional floating bodies in waves are presented. The so called body exact approach is adopted in a numerical wave tank. A new scheme for pressure evaluation on the wetted hull is developed and systematically used with good results in terms of accuracy and stability. Strongly flared geometries are successfully handled even at very large amplitude motions. The validation of the code is carried out according to the 20th ITTC Seakeeping Committee recommendations through internal checks of consistency and through comparisons with available experimental data.
Numerical wave tank computations of nonlinear motions of two-dimensional arbitrarily shaped free floating bodies
Numerische Berechnungen der nichtlinearen Bewegungen von zweidimensionalen zufallsgeformten frei schwimmenden Körpern in Wellen
Ocean Engineering ; 27 , 5 ; 531-556
2000
26 Seiten, 16 Bilder, 3 Quellen
Article (Journal)
English
Numerical simulation of motions of two-dimensional floating bodies
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