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Showing papers in "Applied Ocean Research in 2020"


Journal ArticleDOI
TL;DR: In this article, the effects of the downstream plate length and the arrangement of plates on the hydrodynamic forces, vibration response and flow wake were examined using the direct numerical simulation (DNS).

102 citations


Journal ArticleDOI
TL;DR: In this paper, an Unsteady Reynolds Averaged Navier-Stokes (URANS) based full-scale ship self-propulsion model was developed to predict the effect of biofouling on the selfpropulsion characteristics of the fullscale KRISO container ship (KCS).

63 citations


Journal ArticleDOI
TL;DR: A maritime route extraction method based on ship history automatic identification system (AIS) data is proposed, and the results show that this method can effectively extract maritime traffic routes.

62 citations


Journal ArticleDOI
TL;DR: A robust sliding mode formation control strategy is presented by utilizing backstepping method, adaptive neural network and dynamic surface control technique for leader-follower formation control of underactuated autonomous underwater vehicles subject to uncertain dynamics and ocean disturbances.

61 citations


Journal ArticleDOI
TL;DR: An 8 degree-of-freedom (DOF) mathematical model of the wave glider based on the active propeller control is developed and the results demonstrate that the propellers control based waveglider has better maneuverability than the conventional rudder control basedwave glider.

60 citations


Journal ArticleDOI
TL;DR: In this paper, the basic studies, design, construction and operation of a shoreline OWC wave power pilot plant on the island of Pico, Azores, Portugal was described.

58 citations


Journal ArticleDOI
Xiaohe Li1, Baozhi Sun1, Chunyu Guo1, Wei Du1, Yanjun Li1 
TL;DR: This study performs a speed optimization of a 4250 TEU container ship in which the influence of sea states and voluntary speed loss on ship sailing are considered, and shows that the optimization results of the model with voluntary speed losses are significantly different from those without.

53 citations


Journal ArticleDOI
TL;DR: In this article, the authors investigate the downstream field of a horizontal axis turbine supported by a mono pile and show that the flow field within three rotor diameter downstream is strongly influenced by the supporting structures, which lead to asymmetric recovery trend for velocity, turbulence and Reynolds shear stress.

51 citations


Journal ArticleDOI
TL;DR: In this article, the Eulerian finite element method is introduced to continuously simulate the shock wave and non-spherical bubble evolution stages near a horizontal solid wall with the volume of fluid method and pressure balance technique used to resolve the multi-medium flow.

48 citations


Journal ArticleDOI
TL;DR: The main objective is to present alternative algorithms to neural networks when improving sea state forecast by numerical models considering main spectral bulk parameters at a specific location, namely significant wave height, peak wave period and peak wave direction.

45 citations


Journal ArticleDOI
TL;DR: This paper integrates DBSCAN and Artificial Neural Network capable of automatic ship route design based on massive AIS data between certain ports and produces a research framework capable of generating ship route automatically according to different ship dimensions.

Journal ArticleDOI
TL;DR: An intelligent path planning algorithm and a collision avoidance control method of the USV swarm in restricted waters are presented in this paper, which point out that the path is feasible and the USVs swarm can avoid static obstacles as well as moving vessels.

Journal ArticleDOI
TL;DR: An adaptive robust control scheme based on sliding mode control with a nonlinear disturbance observer is proposed that can effectively solve the challenges aroused by parametric uncertainty and unknown time-varying external disturbances.

Journal ArticleDOI
TL;DR: In this article, the impact of various types of hull roughness on additional resistance and wake fields are computed and presented for the well-established test case KVLCC2, showing that disparities in surface texture cause large differences in additional resistance, and consequently no strong correlation to a single parameter.

Journal ArticleDOI
TL;DR: Two implementations of the fictitious domain (FD) method are employed to simulate water-entry and water-exit problems and demonstrate their ability to simulate practical marine engineering problems.

Journal ArticleDOI
TL;DR: In this article, a blending technique is proposed which takes advantage of both these wind fields and produces a blended wind field using a smoothing algorithm and superposition technique that provides realistic estimates of both inner and outer core winds.

Journal ArticleDOI
TL;DR: In this paper, a time-domain coupled hydroelastic dynamics model has been developed to solve the tunnel-mooring-train interaction under wave excitations, where the equations of motion for a tunnel and mooring lines are based on the finite element rod theory with the Galerkin formulations.

Journal ArticleDOI
TL;DR: In this paper, a floating breakwater integrated with oscillating water column (OWC) wave energy converters is presented, where the energy extraction and motion characteristics of the installed devices are explored across parameters including device configurations, breakwater width, power take-off damping, wave height and motion constraints.

Journal ArticleDOI
TL;DR: A dynamic Bayesian networks (DBN)-based fault diagnosis methodology of subsea XT considering component degradation and safety-fault is presented, appropriate in providing maintenance instructions to engineers.

Journal ArticleDOI
TL;DR: This paper performs comprehensive risk analysis by using bow-tie method within a fuzzy logic environment and supports maritime professionals to enhance safety awareness about the cargo liquefaction phenomenon.

Journal ArticleDOI
TL;DR: A simulation-based design optimization (SBDO) tool is proposed for the design of rim driven thrusters and results prove the flexibility and the reliability of the SBDO framework in dealing with unconventional configurations.

Journal ArticleDOI
TL;DR: In this article, a rectangular barge consisting of multiple oscillating water columns (OWCs) is considered and the effect of the turbine is characterized as a linear power take-off (PTO) system.

Journal ArticleDOI
Qi Wu1, Jianmin Yang1, Haining Lu1, Wenyue Lu1, Lei Liu1 
TL;DR: In this paper, the effects of the heaving motion of the surface vessel on the dynamic response of a vertical transport system (VTS) is investigated, and three response scenarios are distinguished and analyzed using examples.

Journal ArticleDOI
TL;DR: Efficiency and applicability of the proposed control framework is validated in a comparative manner with the existing controllers and comparative numerical simulations are performed over a four-degree of freedom autonomous underwater vehicle.

Journal ArticleDOI
TL;DR: A novel fixed-time velocity-free fault-tolerant control law is applied to trajectory tracking based on a fixed- time non-singular fast terminal sliding mode manifold (FNFTSMM), able to make an MSV track a reference trajectory exactly, and the tracking errors can be stabilized to the origin in fixed time.

Journal ArticleDOI
TL;DR: In this article, an Extended Range Active Wave Absorption (ER-AWA) method was proposed for absorbing waves in Reynolds-Averaged Navier-Stokes (RANS) models.

Journal ArticleDOI
TL;DR: A quaternions based adaptive non-singular terminal sliding mode control scheme is proposed for an AUV subject to ocean current and modelling uncertainty and the finite-time convergences of both the position tracking error and quaternion error are proved based on Lyapunov theory.

Journal ArticleDOI
TL;DR: In this paper, an analytical model associated with oblique wave interaction with a submerged horizontal flexible porous membrane is presented under the assumption of linearized small amplitude and structural response in finite water depth.

Journal ArticleDOI
TL;DR: In this article, the effects of different spacing ratios among cylinders significantly affect their FIV fatigue damage distributions, and experimental data of two tandem flexible cylinders with a high aspect ratio and a low mass ratio under five different spacing ratio (T/D = 4.0, 6.0 and 8.0), where T is the centre-to-centre distance in the direction of incoming flow and D is the cylinder diameter, were used to analyse their fatigue damage employing the rain flow counting method and S-N curves.

Journal ArticleDOI
TL;DR: In this article, the role of stator parameters, such as the prewhirl angle, the rotor-stator spacing and the chord length of the stator blades, in the propulsion performance and unsteady forces of a pump-jet propulsor is investigated through a numerical simulation.