... between computational cost and the quality of the approximation may be necessary since second-order motions are input for riser and structural analyses. Assessment of roll damping in second-order motions is also crucial due to its impact on roll motion levels. The use of roll damping devices remains...

... Abstract The objective of present paper is to assess the roll damping characteristics of FLNGs and FPSOs. The roll damping characteristics are examined through the three prediction methods; 1) Ikeda’s empirical method, 2) experimental tests and 3) CFD simulations. Practically, design variables...

... Abstract A hull-pendulum system is introduced to investigate the roll damping of a hull through roll decay. Compared to conventional roll decay tests, this method can reduce the decay of the KC number (roll amplitude) and more conveniently allows for a range of oscillatory frequencies...

... the hydrodynamic issues examined in the development of aft body hull form equipped with three azimuth thrusters. Hydrodynamic performance considered include roll damping, transit performance, thruster interference with hull and with other thrusters, and stern slamming. Constructability issues which may...

... of the models. The estimated damping ratio from RDM show the good agreement with roll decay tests. This great achievement can help us to precisely predict the vessel roll response in random seas in order to avoid dangerous situation. roll damping roll natural period random decrement method roll...

... Abstract In this work, the roll damping behavior of the offshore heavy lift DP3 installation vessel Orion from the DEME group is studied. Boundary element codes using potential flow theory require a roll damping coefficient to account for viscous effects. In this study, the roll damping...

... Abstract Estimates for roll damping are important input parameters for simulation studies on vessels operating at sea, e.g. FPSO mooring in waves, wind and current, workability and operability investigations, Dynamic Position studies, ship-to-ship operations and safety studies of vessels...

... Abstract Despite of numbers of method to estimate and predict the nonlinear roll damping, it is the mode least understood and the most difficult to determine so far. Reviewing the existing methods reveals that the coupling effects of other modes on roll motion are ignored by assuming just one...

... and bilge keel height of a barge-shaped and tanker-shaped FPSOs. A parametric study to figure out the effect of bilge radius and bilge keel height on the roll damping performance is conducted through a series of numerical roll free decay simulations based on Computational Fluid Dynamics (CFD). The bilge...

... Abstract In this work, the roll damping behavior of the offshore heavy lift DP3 installation vessel Orion from the DEME group is studied. Boundary element codes using potential flow theory require a roll damping coefficient to account for viscous effects. In this work, the roll damping...

... 01 11 2011 The topic of this paper is the roll motion prediction of ship-shaped FPSO’s, designed for continuous operation at site location. The maximum roll amplitude is a critical operability parameter which is difficult to predict accurately due to the nonlinear roll damping...

... 22 02 2010 For ships, barges and similar long offshore structures roll natural period generally falls within the frequency range of a typical wave energy spectrum generally experienced by them. This causes dynamic amplification of rolling motion. For these structures the roll damping...

... behaviour will be presented and compared with results of model tests. 27 07 2009 Dual Draft vessel pipelay vessel heavy-lift vessel motion behaviour roll damping roll statistics model tests Proceedings of the ASME 27th International Conference on Offshore Mechanics and Arctic...