Results 251 to 260 of about 4,462 (291)

Adaptive steering and roll damping control for yachts

International Journal of Modelling, Identification and Control, 2008
Due to many special characteristics of the motion of a yacht in response to wind, sea and other conditions, the issues associated with designing an automatic controller for a yacht steering and rolling stabilisation are quite different from those for engine-powered vessels.
Cheng Mo Xiao, Sing Kiong Nguang, Peng Shi 0001   +2 more
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On damping models in free and forced rolling motion

Ocean Engineering, 1982
In this paper two different models for the damping moment to introduce in the roll motion differential equation are considered. They are linear+quadratic and respectively linear+cubic in the roll velocity and contain angle dependent terms. They constitute a generalization of all the models up to now presented in the literature.
Cardo A., FRANCESCUTTO, ALBERTO, NABERGOJ, RADOSLAV   +2 more
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On the Frictional Damping of the Rolling of a Circular Cylinder

Journal of Ship Research, 1980
The frictional damping of the rolling motion of a circular cylinder is nonlinear. Although negligible at full scale, it may be important in model scale. The damping force is calculated using Fourier analysis of the frictional force on the surface of a cylinder with a vertical axis executing simple harmonic oscillations about its axis.
Dag Myrhaug, Ivar Øyvind Sand
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Roll and Sway-Roll Damping for Three Small Fishing Vessels

International Shipbuilding Progress, 1991
The determination of roll damping for non-standard hull shapes continues to be an important but difficult problem. For small fishing vessels with deep skegs and hard chines the problem is particularly difficult. In order to develop and judge suitable analytical, semi-empirical, and numerical techniques for the prediction of roll damping, the authors ...
Bass D.W., Haddara M.R.
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The Nonlinear Roll Damping of a FPSO Hull

Journal of Offshore Mechanics and Arctic Engineering, 2013
The ship-rolling problem is a subject that has been studied for a long time. Since Froude's time (in the 19th century) to nowadays, this subject was revisited several times in order to adjust the theory to changes in ship hulls, dimensions, materials, appendages, etc. On the other hand, ship analysis technological resources, including both experimental
Allan C. de Oliveira, Antonio Carlos Fernandes   +1 more
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Modern approach to automatic roll damping

MORSKIE INTELLEKTUAL`NYE TEHNOLOGII)</msg>, 2023
Работа посвящена задаче демпфирования бортовой качки. Обсуждаются особенности современных датчиков качки, а также средств управления (демпфирования) качки. На примере бортовых рулей показаны особенности динамики приводов. На математической модели качки судна, оборудованного бортовыми рулями, с полигармоническим волновым возмущением подробно исследуется
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Damping of roll vibrations of vehicle suspension

Vehicle System Dynamics, 2014
Small forced vibrations of an axle model of independent suspensions having four degrees of freedom are studied. The exact analytical solution of the generalised Lagrange equation enables one to produce 3D plots of the normalised amplitudes of forced vibrations versus frequency and excitation ratio or phase difference of the road inputs. The analysis of
K.C. Le, A. Pieper
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Nonlinear Roll Damping and Roll Motion Study of Asymmetric Catamaran With Variable Layout

Volume 6A: Ocean Engineering, 2020
Abstract Because of the interference between the main hull and side hull, the layout of asymmetric catamaran has a great influence on the seakeeping performance. In order to assess the characteristics of roll damping and roll motion of this kind of ship, firstly, a numerical prediction method of roll damping is established by CFD with ...
Yihan Zhang, Jingfeng Hu
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Estimation of Roll Damping for Transportation Barges

Volume 1: Offshore Technology, 2009
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 is highly nonlinear.
Sharad S. Dhavalikar, Amresh Negi
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DAMPING CORRUGATOR ROLL

2001
A damping corrugator roll comprises an outer toothed surface, whose teeth extend over a certain axial length of the roll (2), support means (202) allowing rotation about the axis of the roll, and rotary drive means (1), characterized in that it comprises a cylindrical core which is supported for free rotation at its ends, and whereon a toothed ...
AGNATI SPA, ROSSI GIULIANO, SCENINI GIANCARLO, GIOVE RAFFAELE   +3 more
openaire   +1 more source