Showing papers in "Applied Ocean Research in 2011"

TL;DR: In this paper, a hydrodynamic model of perforated or slotted structures is proposed, in which the openings are infinitely small and numerous, and the wall thickness is assumed to be nil.

TL;DR: In this paper, a method for conducting leeway field experiments to establish the drift properties of small objects (0.1-25 m) is described, where the objective is to define a standardized and unambiguous procedure for condensing the drifting properties down to a set of coefficients that may be incorporated into existing stochastic trajectory forecast models for drifting objects of concern to search and rescue operations and other activities involving vessels lost at sea such as containers with hazardous material.

TL;DR: In this article, the authors focused on the cross-flow vortex-induced vibrations (VIV) of a vertical riser with a constant tension and placed in linearly sheared currents.

TL;DR: In this article, two continuous models using a Lagrangian approach or an updated Lagrangians are presented, both including different kinds of boundary condition at the umbilical bottom end.

TL;DR: In this article, the authors investigated the use of irregular nonlinear (second-order) waves for estimating loads on the support structure (monopile) of an offshore wind turbine.

TL;DR: In this article, self-propulsion in model scale free to sink and trim is studied with the rotating discretized propeller from the Hamburg Model Basin (HSVA) at Fr = 0.26.

TL;DR: In this paper, a time-domain numerical model is established for computing the action of internal solitary wave on marine structures and structure motion responses for a cylindrical structure, its side and bottom are discretized by pole and surface elements, respectively The drag and inertial forces in the perpendicular direction of the structure are computed by the Morison equation from the pole elements, and the Froude-Krylov force in the axial direction due to internal wave motion is computed by integration of the dynamic pressure over the surface elements.

TL;DR: In this paper, a calculation method on the dynamic bending moment of bubble has been put forward in order to evaluate the impact of underwater explosion bubble load on the longitudinal strength of surface ships.

TL;DR: In this paper, an experimental investigation on a laboratory model of a jacket platform with the objective of establishing a baseline finite element (FE) model for long-term structural health monitoring for this type of structures is conducted.

TL;DR: In this article, the wave-induced scour was studied in both clear water and live bed conditions using the M5' model tree as a novel soft computing method, which can provide understandable formulas.

TL;DR: In this article, the performance of a Wells turbine with various non-uniform tip clearances was investigated using computational fluid dynamics (CFD) using numerical models of a NACA0020 blade profile under steady flow conditions.

TL;DR: In this paper, a linear single-degree-of-freedom (SDOF) system along with a bi-lognormal probability model for significant wave heights and zero-crossing wave periods have been used for numerical tests.

TL;DR: In this paper, an unstructured grid, Finite Volume Coastal Ocean Model (FVCOM), is used to study hydrodynamics and large-scale structure impacts in Changjiang Estuary.

TL;DR: In this paper, the authors extended an analytical solution for vertical pipeline buckling on a rigid seabed to a soft seafloor, and analyzed the effects of soil resistance on pipeline stability, buckling mode and amplitude.

TL;DR: In this article, an Euler-Euler two-phase model was developed to investigate the tunnel erosion under a submarine pipeline exposed to unidirectional flow, where both of the fluid and sediment phases were described via the Navier-Stokes equations.

TL;DR: In this paper, a Monte Carlo-based integration procedure combined with an interpolation scheme to obtain the parameters of the short-term response distribution is employed to hasten the long-term analysis.

TL;DR: In this article, a flexible backbone model was designed with five cut-outs on the top side of the aluminum beam to realize approximately torsional stiffness as well as vertical and horizontal bending stiffness.

TL;DR: In this article, an experimental study of a submerged plate used as a breakwater for coastal areas protection is presented, where the influence of current on the reflective power of the plate and its influence on the hydrodynamic loads exerted on it is investigated.

TL;DR: In this article, the authors extended the hybrid method for the fatigue analysis of moorings and risers, and the fatigue damage was calculated using the results from time domain analysis in conjunction with rainflow counting.

TL;DR: In this paper, a numerical model based on the Eigen function expansion theory for linear waves was developed to investigate the reflection and transmission characteristics of a pile supported skirt breakwater consisting of single and double rows.

TL;DR: In this paper, the authors developed a robust, accurate and computationally efficient hydrodynamic and sediment transport model for dam break flows based on the finite volume method with an unstructured quadtree mesh.

TL;DR: In this paper, a coupled-mode model was developed for treating the wave-current-seabed interaction problem, with application to wave scattering by nonhomogeneous, steady current over general bottom topography.

TL;DR: In this article, a hydroelastic model is developed to deal with surface gravity wave interaction with an elastic bed based on the small amplitude water wave theory and plate deflection in finite water depth.

TL;DR: In this article, the performance of two well accepted formulations for white capping and wind input of third generation wave models was investigated using parallel unstructured SWAN (PunSWAN).

TL;DR: In this article, a lift-based wave energy converter, namely, a cycloidal turbine, is investigated, which consists of a shaft with one or more hydrofoils attached eccentrically at a radius.

TL;DR: In this paper, a MIMO (multi-input multi-output) optimal control system that has two control inputs such as fin stabilizers and pod propellers is designed to reduce the roll motion of cruise ships in regular waves.

TL;DR: In this paper, a second-order model is proposed to predict the shoaling of a bichromatic sea-state propagating in varying water-depth, and the model is validated through comparisons with an extension of Schaffer's model for a straight beach.

TL;DR: In this paper, a theoretical methodology to determine the open-loop directional stability of a near-surface AUV is presented, which involves a solution of coupled sway and yaw equations of motion in a manner similar to that carried out for surface ships.

TL;DR: In this article, the authors investigated the hydrodynamic interactions between water waves and porous bodies and concluded that porosity dissipation makes a more substantial contribution to wave drift forces than does conventional dissipation created by scattered and radiated waves.

TL;DR: In this paper, a new approximate analytic solution for water wave scattering by a submerged horizontal porous disk in the context of the linear potential theory is given, which is based on the domain decomposition method.