Last. Hongda Shi(OUC: Ocean University of China)H-Index: 11
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Abstract null null Wave energy resources are huge and widely distributed all over the world. Wave energy converters (WECs) are employed to harness this energy. In this paper, a heaving point absorber WEC with three kinds of Power Take-Off (PTO) systems is investigated. A fully nonlinear numerical model of the WEC has been developed, taking into consideration viscosity. A Computational Fluid Dynamics (CFD) analysis is performed in order to determine the quadratic viscous term coefficient. A physi...
Last. Angel M. Ramos(Complutense University of Madrid)H-Index: 18
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Abstract null null We present a Compositional Eulerian model to forecast the evolution of oil spills in the sea. The model allows studying the fate of not only the oil concentration but also of each component (e.g., volatile, non-volatile, water in the oil). Therefore, the problem is formulated as a conservation equation for each component, plus an equation to estimate the age of the oil, which allows us to assess weathering processes (e.g., evaporation, natural dispersion, emulsion) and the ass...
Last. Huixuan Fu(HEU: Harbin Engineering University)H-Index: 1
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Abstract null null When ships sail in the sea, they will move irregularly due to the influence of strong wind, waves and other complex marine environment. Among them, the ship roll is very important to the safety of ship navigation. In order to ensure navigation safety, it is necessary to predict the ship roll effectively and accurately in advance to provide a basis for ship advance control. Aiming at the problem that traditional methods and machine learning methods are not accurate for ship rol...
#2Guan-Lee Huang(NSYSU: National Sun Yat-sen University)
Last. Bang-Fuh Chen(NSYSU: National Sun Yat-sen University)H-Index: 15
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Abstract null null Tuned mass damper (TMD) and tuned liquid damper (TLD) have been reported to be feasible for motion control of offshore wind turbines. In this paper, we numerically investigate the performance of the hybrid TMD + TLD system on the motion reduction of a structure. The dynamic response of the structure can be notably suppressed when the optimal tuned frequency and damping of TMD are chosen. The addition of TLD would further reduce the motion of the structure when the natural freq...
Abstract null null Existence of crack causes reduction of the load carrying capacity of ship hull structural elements and eventually reduces the hull girder strength. Previous numerical and semi-analytical studies by the same authors revealed that in addition to the value of ultimate strength, the deflection shape and plastic collapse mechanism of ship hull structural elements will change due to existence of cracking damage. In this paper results from previous studies are used to investigate the...
Abstract null null Owing to the high-speed motion and high-pressure load characteristics of water jet, explosion bubble plays an important influence on the surrounding structures in underwater explosion (UNDEX). Based on interface compression and density correction treatment, an important compressible multicomponent flow model is proposed and its discrete method is briefly introduced in the study. This method shows a great potential in multicomponent flow, especially in the research of water jet...
Last. Weidong Zhang(Dalian Maritime University)H-Index: 61
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Abstract null null This note investigates an event-triggered robust adaptive control for path following of the unmanned robot sailboat (URS) by employing the proportional integral sliding mode manifold and the robust neural damping technique in presence of marine practice. The dominant assignment of this note can be summarized into three points: (1) The double-layer virtual guidance is developed to generate the reference signal for three navigation conditions (i.e., the upwind sailing, the downw...
#1Jiayi Xu(DUT: Dalian University of Technology)H-Index: 2
#2Shuxue Liu(DUT: Dalian University of Technology)H-Index: 12
Last. Wei Jia(DUT: Dalian University of Technology)H-Index: 3
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Abstract null null Presently, most studies of wave height distribution on slopes are based on normal incident unidirectional waves. In this study, the wave height, crest, and trough distributions of oblique incident unidirectional and multidirectional irregular waves on a 1:15 slope were experimentally investigated. The Composite Weibull Distribution fitted the experimental data well and could be applied to predict the wave height, crest, and trough distributions for unidirectional and multidire...
#2Xiaodi Wang(CUG: China University of Geosciences)
Last. Kai Xia(CUG: China University of Geosciences)
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Abstract null null Maritime accidents occur with alarming frequency. Finding wrecked objects accurately and efficiently is the primary goal of search and rescue (SAR) operations at sea. The objective of this study is to determine the drift characteristics of persons-in-the-water (PIWs) in the South China Sea via field experiments in conjunction with Monte Carlo simulations. A series of maritime drift experiments were carried out in the South China Sea using dummy buoys in vertical and horizontal...
Last. Yasunori Nihei(OPU: Osaka Prefecture University)H-Index: 7
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Abstract null null Single-Point Mooring (SPM) is a cost-effective and promising solution that can be utilized to station a Floating Offshore Wind Turbine (FOWT). However, it poses new challenges such as wind tracking performance and slow-drift motion, which are unexplored. In this study, an attempt is made to understand the wind tracking performance of a new-type FOWT ‘Optiflow’ moored by SPM system. Real-Time Hybrid Model (ReaTHM) testing is conducted on a 1/60 scale model and motion about the ...
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