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Showing papers in "Ocean Engineering in 2010"


Journal ArticleDOI
TL;DR: In this article, a leader-follower formation control of multiple underactuated autonomous underwater vehicles (AUVs) is proposed, where the follower tracks a reference trajectory based on the leader position and predetermined formation without the need for leader's velocity and dynamics.

566 citations


Journal ArticleDOI
TL;DR: In order to identify the correlation of CPA, which is a key indicator for collision avoidance, with ship's size, speed, and course, linear regression models are developed and a dynamic method based on SAMSON is presented.

300 citations


Journal ArticleDOI
TL;DR: In this article, a numerical storm surge model was applied to assess the sensitivity of surge response to specified wetland loss, and results suggest that wetlands do have the potential to reduce surges but the magnitude of attenuation is dependent on the surrounding coastal landscape and the strength and duration of the storm forcing.

296 citations


Journal ArticleDOI
TL;DR: In this article, a model predictive control (MPC) scheme with line-of-sight (LOS) path generation capability is formulated for a way-point tracking of underactuated surface vessels with input constraints.

263 citations


Journal ArticleDOI
TL;DR: In this article, a global smooth controller for underactuated ships is presented, which is based on several nonlinear coordinate changes, the transverse function approach, the back-stepping technique, the Lyapunov direct method, and utilization of ship dynamics.

239 citations


Journal ArticleDOI
TL;DR: In this article, the authors identify and provide an understanding of the principal parameters that govern the downstream wake structure and its recovery to the free-stream velocity profile, and demonstrate that there are a number of interdependent variables that affect the rate of wake recovery and will have a significant impact on the spacing of marine current turbines within an array.

239 citations


Journal ArticleDOI
TL;DR: In this paper, the influence of the spatial configuration of a wave energy device array upon total power output is investigated using a method capable of producing the linear wave theory solution to arbitrary accuracy.

180 citations


Journal ArticleDOI
TL;DR: In this paper, the potential impacts of 0.5 and 1.0m of relative sea level rise (RSLR) on hurricane surge and waves in southeast Louisiana are investigated using the numerical storm surge model ADCIRC and the nearshore spectral wave model STWAVE.

134 citations


Journal ArticleDOI
TL;DR: In this paper, a series of wind field snapshots at 3-h intervals to depict the wind structure of Hurricane Katrina when in the Gulf of Mexico were collected and processed to a common framework for height, exposure, and averaging time.

133 citations


Journal ArticleDOI
TL;DR: In this article, the flow about a circular cylinder placed centrally inside a channel is studied numerically with an unstructured collocated grid finite volume method based on the primitive variable formulation.

127 citations


Journal ArticleDOI
TL;DR: In this article, the authors used a finite volume approach for solving the Reynolds averaged Navier-Stokes equations combined with a k-e turbulence model for describing the flow through and around a net panel.

Journal ArticleDOI
TL;DR: In this paper, wave farms composed of two either surging or heaving wave energy converters are considered and the impact on the absorbed wave power of the separating distance between the two systems and the wave direction is studied.

Journal ArticleDOI
TL;DR: In this article, the results of two-dimensional finite element method simulations that predict the real-time tidal characteristics during the construction and after the completion of the tidal power plant are presented, including a method to estimate the electricity output from the plant in the future.

Journal ArticleDOI
TL;DR: A mathematical model including seakeeping and maneuvering characteristics to analyze the roll reduction for a ship traveling with the stabilizer fin in random waves and shows that the present developed self-tuning PID control scheme based on the neural network theory is indeed quite practical and sufficient for the ship roll reduction in the realistic sea.

Journal ArticleDOI
TL;DR: Two independent approaches have been developed to reduce the number of storm surge simulations that are required, both of these so-called JPM-OS (JPM-Optimal Sampling) methods seek to accurately cover the entire storm parameter space through optimum selection of a small number of parameter values so as to minimize thenumber of required storm simulations.

Journal ArticleDOI
TL;DR: In this paper, an assessing formula for the ultimate strength of hull structural plate with pitting corrosion damage under the biaxial in-plane compression loading was derived in theory, and which was then completed through numerical experiment by employing nonlinear finite element analyses for series of corroded plate models.

Journal ArticleDOI
TL;DR: This study aims to propose a forecasting scheme that enables to make forecasts up to 48 h lead time using the combination of wavelet and fuzzy logic approaches and it is seen that WFL outperforms those methods in all cases.

Journal ArticleDOI
TL;DR: In this article, a standing wave-induced dynamic response and instability of seabed around a caisson breakwater are investigated. And the results from different formulations suggest the use of all inertial terms (fully dynamic formulation) providing the most complete solution and the least conservative response.

Journal ArticleDOI
TL;DR: A simple hydrodynamics-based surge scale for hurricane surge hazard is presented, which incorporates readily available meteorological information along with regional-scale bathymetry into a single measure of expected surge levels at the coast.

Journal ArticleDOI
TL;DR: Following the extreme flooding caused by Hurricane Katrina, the Federal Emergency Management Agency (FEMA) commissioned a study to update the Mississippi coastal flood hazard maps, which included development and application of new methods incorporating the most recent advances in numerical modeling of storms and coastal hydrodynamics, analysis of the storm climatology and flood hazard evaluation as mentioned in this paper.

Journal ArticleDOI
TL;DR: In this paper, changepoint analysis is used to detect changes in variability within GOMOS hindcast time-series for significant wave heights of storm peak events across the Gulf of Mexico for the period 1900-2005.

Journal ArticleDOI
TL;DR: In this article, a numerical study of the transient effect of tendon disconnection on global performance of an extended tension leg platform (ETLP) during harsh environmental conditions of Gulf of Mexico (GoM) is presented.

Journal ArticleDOI
TL;DR: In this paper, the dynamic response simulation of heavy cargo suspended by a floating crane is performed and the dynamic equations of the motions of the floating crane and the heavy cargo must be considered by the coupled equations.

Journal ArticleDOI
TL;DR: In this article, a floating breakwater with an impermeable vertical sidewall is considered and its performance in waves is investigated, which shows that the structure can reduce incident wave height by dissipating wave energy more than reflecting it.

Journal ArticleDOI
TL;DR: In this paper, a Boussinesq wave model was used to predict the overtopping of the east-facing levees of the Mississippi River-Gulf Outlet (MRGO) during Hurricane Katrina.

Journal ArticleDOI
TL;DR: The proposed two level-set models are accurate and robust when they are applied to noisy sonar images and do not require re-initialization, which is usually a very costly procedure.

Journal ArticleDOI
J.E. Choi1, Keh-Sik Min1, Jung Hun Kim1, Sang Bong Lee1, Heung-Won Seo1 
TL;DR: In this paper, the authors used computational tools to examine the speed performance of various types of commercial ships including resistance and propulsion characteristics, and the results showed the differences in the resistances and propulsion properties of different types of ships.

Journal ArticleDOI
TL;DR: In this paper, the authors developed a numerical model to systematically analyze the relationship between the power output and the configuration of a twin-turbine system, and showed that the total power output of a twobot system with optimal layout can be about 25% higher than two times that of a stand-alone turbine.

Journal ArticleDOI
TL;DR: In this paper, the authors use the conditional approach to characterise the dependence structure of wave spectral parameters such as signicant wave height (HS) and spectral peak period (TP ).

Journal ArticleDOI
TL;DR: In this article, a hybrid finite volume-finite difference scheme is applied to study surf zone dynamics, which can accurately predict wave height decay and mean water level setup, for both regular and solitary wave breaking on a sloping beach.