Results 261 to 270 of about 4,462 (291)

Evaluating Roll Damping in Parametric Rolling: Challenges and Approaches

The prediction of parametric rolling in ships remains a critical area of research due to the significant impact on maritime safety and vessel performance. Among the various parameters influencing parametric rolling, roll damping is notoriously challenging to assess due to its nonlinear nature.
Turk, Anton, Prpić Oršić, Jasna, Sulovsky, Ivan, Balas, Marijana   +3 more
openaire   +1 more source

Roll Damping For Small Fishing Vessels

SNAME 22nd American Towing Tank Conference, 1989
The successes of Naval Architects in predicting ship motions in waves, have been mainly confined to motions other than roll. For roll motions it has long been recognized that roll damping for wave encounter frequencies near the natural roll frequency is not only an extremely significant parameter but also very difficult to predict accurately.
D. Bass, K. Haddara
openaire   +1 more source

Numerical Simulation of Roll Damping of a FPSO

Volume 3: Pipeline and Riser Technology; CFD and VIV, 2007
The viscous flow problem of roll damping of a FPSO is investigated by means of numerical solution of the unsteady two-dimensional Navier-Stokes equations. The finite volume method using unstructured grid is used to solve the integral form of the governing equations.
Juan B. V. Wanderley, Andre´ Ramiro, Thiago Reis, Antonio Carlos Fernandes, Carlos Levi   +4 more
openaire   +1 more source

Nonlinear Models of Ship Roll Damping

International Shipbuilding Progress, 1988
The paper looks at various forms for the roll damping moment of ships and introduces two techniques to identify the parameters of the various models together with a methodology for their evaluation. The emphasis in the paper is on the possibility of using complete portions of roll decay curvf1s rather than decrement curves derived from the peak values ...
Bass D.W., Haddara M.R.
openaire   +1 more source

Roll-damping qualities of constructive stabilizers

International Shipbuilding Progress, 2008
The paper presents the description and results of a model experiment carried out for comparison of the roll-damping qualities of continuous bilge keels and of wing ledges, installed in a staggered order, during rolling of the ship at zero forward speed. The damping qualities of constructive stabilizers were investigated also at motion
Segal Zelik, Segal Alexander
openaire   +1 more source

A Note on the Form of Ship Roll Damping

Journal of Ship Research, 1978
The objective of the present work was to develop an approximation to the conventional mixed linear-plusquadraticship roll damping model so that analytical obstacles could be overcome in the application of the functional series expansion to nonlinear ship rolling. A mixed linear-plus-cubic approximation was found to be reasonable for this purpose.
openaire   +1 more source

A Pragmatic Approach to Roll Damping

2023
Jakub Cichowicz, Dracos Vassalos
openaire   +1 more source

The Damping Capacity of Damping Devices during Rotor-over-Stator Rolling

Thermal Engineering, 2019
The article presents results of investigating the influence of elastic damping devices that secure the rotor and the stator under high-amplitude oscillations under unfavorable development of an accident, e.g., upon rubbing of the rotor against the stator.
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The Effect of Shallow Water on Roll Damping and Rolling Period

2016
Significant effort has been made to quantify and predict roll damping of vessels in the past. Similarly, efforts have been made to provide effective methods for calculating the roll gyradius of vessels. Both the damping and the gyradius of a vessel are traditionally quantified through the use of a sally test.
openaire   +1 more source

Numerical and experimental study on nonlinear roll damping characteristics of trimaran vessel

Ocean Engineering, 2022
Pengyao Yu
exaly