Results 281 to 290 of about 663,862 (352)

Near Term Ship Motion Forecasting From Prior Motion

Volume 1B, Symposia: Fluid Mechanics (Fundamental Issues and Perspectives; Industrial and Environmental Applications); Multiphase Flow and Systems (Multiscale Methods; Noninvasive Measurements; Numerical Methods; Heat Transfer; Performance); Transport Phenomena (Clean Energy; Mixing; Manufacturing and Materials Processing); Turbulent Flows — Issues and Perspectives; Algorithms and Applications for High Performance CFD Computation; Fluid Power; Fluid Dynamics of Wind Energy; Marine Hydrodynamics, 2016
Ship-motion forecasting can be useful for naval operations such as aircraft landing, cargo transfer, off-loading of small boats, and ship “mating” between a large transport ship and smaller ships. The forecasted ship motion is particularly useful in sea states above SS3 when unanticipated large motions can suddenly occur.
John Vorwald, Alan Schwartz, Christopher Kent   +2 more
openaire   +1 more source

Neural Network-Based Adaptive Antiswing Control of an Underactuated Ship-Mounted Crane With Roll Motions and Input Dead Zones

IEEE Transactions on Neural Networks and Learning Systems, 2020
As a type of indispensable oceanic transportation tools, ship-mounted crane systems are widely employed to transport cargoes and containers on vessels due to their extraordinary flexibility.
Tong Yang, Ning Sun, He Chen, Yongchun Fang   +3 more
semanticscholar   +1 more source

Effect of ship motion on ship airwake aerodynamics

2020
The effects of ship motion on the flow field over the deck of the ONR Tumblehome geometry were investigated experimentally. Characterization of the flow field is relevant in the context of safe aircraft operation in the wake region and to provide an accurate prediction of aircraft air-loads in simulators for pilots, and to provide a validation data set
Austin Krebill, Corey D Markfort, Albert Ratner, J Ezequiel Martin, James H J Buchholz, Pablo Carrica   +5 more
openaire   +1 more source

Rankine source time domain method for nonlinear ship motions in steep oblique waves

Ships and Offshore Structures, 2018
This article presents a weakly nonlinear time domain Rankine source boundary element method to calculate wave-induced ship motions. Radiation forces were calculated using convolution integrals, whereas Froude–Krylov and hydrostatic forces were obtained ...
M. Riesner, Guillermo Chillcce, O. el Moctar   +2 more
semanticscholar   +1 more source

A ship motion simulation system

Virtual Reality, 2008
In this article, efficient computational models for ship motions are presented. These models are used to simulate ship movements in real time. Compared with traditional approaches, our method possesses the ability to cope with different ship shapes, engines, and sea conditions without the loss of efficiency. Based on our models, we create a ship motion
Shyh-Kuang Ueng, David Lin, Chieh-Hong Liu   +2 more
openaire   +1 more source

Real Time Ship Motion Estimation

OCEANS 92 Proceedings@m_Mastering the Oceans Through Technology, 2005
The problem of real time estimation of ship mo- tions is consided. The problem is viewed as a nonlinear adaptive estimation problem for partially unknown time- varying linear systems with non-Gaussian initial conditions. The adaptive Lainiotis partitiong approach is applied and com- parisons are made with the Kalman filter.
D.G. Lainiotis, C. Charalampous, P. Giannakopoulos, S. Katsikas   +3 more
openaire   +1 more source

Extreme roll motions of ships

PAMM, 2004
AbstractThe ship capsizing problem is one of the major challenges in naval architecture. The criterion of the International Maritime Organization (IMO) regarding capsize stability is still not including dynamic loads. Existing mathematical models of ships taking into account all degrees of freedom as well as fluid–structure–interaction can hardly be ...
Kreuzer, E., Mestrom, R.M.C., Pick, M.A.
openaire   +1 more source

Ship Motions in Shallow Water

Offshore Technology Conference, 1976
ABSTRACT When operating large ships in water depths only slightly greater than the draft, as super tankers at near-shore terminals, it is necessary to know precisely how much clearance is required for safety. Recent developments in hydrodynamics are applied to determine the motions of a ship due to waves and current
Alan C. McClure, R. Ray Nachlinger
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Ship Motions in Shallow Water

Journal of Ship Research, 1970
The problem discussed concerns small motions of a ship, in all six degrees of freedom, but at zero speed of advance, due to an incident wave system in shallow water of depth comparable with the ship's draft. The problem is completely formulated for an arbitrary ship, and is partially solved for the case when the ship is slender and the wavelength much ...
openaire   +1 more source

Ship motion measurement filter design

IEEE Journal of Oceanic Engineering, 1977
A procedure is presented for designing Kalman filters to measure linear and angular ship motion parameters using realistic models of the ship motion dynamics. The design is based on the state space modeling of ship motion dynamics. The designed filters exhibited significant accuracy improvement (order of magnitude) over filters which do not model ship ...
I. Weiss, T. DeVries
openaire   +1 more source