Abstract
The main transport channel of the global economy is represented by shipping. Engineers and hull designers are more preoccupied in ensuring fleet safety, the proper operation of the ships, and, more recently, compliance with International Maritime Organization (IMO) regulatory incentives. Considerable efforts have been devoted to in-depth understanding of the hydrodynamics mechanism and prediction of ship behavior in waves. Prediction of seakeeping performances with a certain degree of accuracy is a demanding task for naval architects and researchers. In this paper, a fully numerical approach of the seakeeping performance of a KRISO (Korea Research Institute of Ships and Ocean Engineering, Daejeon, South Korea) container ship (KCS) container vessel is presented. Several hydrodynamic methods have been employed in order to obtain accurate results of ship hydrodynamic response in regular waves. First, an in-house code DYN (Dynamic Ship Analysis, “Dunarea de Jos” University of Galati, Romania), based on linear strip theory (ST) was used. Then, a 3D fully nonlinear time-domain Boundary Element Method (BEM) was implemented, using the commercial code SHIPFLOW (FLOWTECH International AB, Gothenburg, Sweden). Finally, the commercial software NUMECA (NUMECA International, Brussels, Belgium) was used in order to solve the incompressible unsteady Reynolds-averaged Navier–Stokes equation (RANSE) flow at ship motions in head waves. The results obtained using these methods are represented and discussed, in order to establish a methodology for estimating the ship response in regular waves with accurate results and the sensitivity of hydrodynamical models.
Highlights
Shipping, often considered as the main transport channel of the global economy, is responsible for approximately 80 percent of world trade
The objective of the present study is to investigate the seakeeping performances of the KRISO container ship (KCS) while sailing in regular wave at two speeds, 12 and 24 Kn, corresponding to Froude numbers of 0.13, and 0.26, respectively
The results are represented in the frequency domain, in terms of response amplitude operators (RAO) for heave, pitch and roll motion, respectively
Summary
Often considered as the main transport channel of the global economy, is responsible for approximately 80 percent of world trade. An increasing focus on more environmentally friendly shipping pushes hull designers to further ensure fleet safety, proper operation of the ships, and, more recently, compliance with International Maritime Organization (IMO) regulatory incentives regarding the energy efficiency operational indicator (EEOI) and emissions reduction. Considerable efforts have been devoted to an in-depth understanding of the hydrodynamics mechanism and the prediction of ship behavior in waves. Prediction of seakeeping performances with a certain degree of accuracy is a demanding task for naval architects and of great practical interest for shipbuilders, owners, operators, as it affects both the ships’ design and operation [1]. The shipping industry has embraced more and more digitalization. Digital twin concept couples physical–numerical modelling and simulation to evolve solutions that improve vessel predictability, behavior control and response
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