ULTIMO AGGIORNAMENTO BANCA DATI: 13/09/2024 13:00:57
ABSTRACT Rust removal is a necessary step of surface coating treatment in shipbuilding and ship repairing industry. As one of the efficient and environment protecting application methods, the derusting technique using ultra-high pressure water jet is favorable in many developed shipyards. The straight ...
ABSTRACT The research about the sloshing inside liquid tanks and the consequent boat's motions always attract much attention. Based on the three-dimensional potential flow theory and by means of analyzing the seine boat's motion under various working conditions, the hydrodynamic coefficients are obtained ...
ABSTRACT Ice load is an important factor in ship structure design and safe navigation. In view of the advantages of Discrete Element Method (DEM) in dealing with the problem of discontinuous medium, the ice resistance of ships in flat ice area is analyzed by using DEM, and the resistance of water body ...
ABSTRACT The rapid development of the offshore wind industry has generated increased interest in marine environments. To obtain environmental data pertinent to the operation of an offshore wind farm, a metrology mast was installed by the Taiwan Power Company (TPC). This study focusses on structural ...
ABSTRACT This paper studies, through physical model experiments, the attenuation performance of a new type of box-type free-surface breakwater with symmetrical wavy bottom. A series of experiments were carried out with changing the box immersion depth and the wave steepness. The transmission coefficient, ...
ABSTRACT A time domain higher-order Rankine panel method is developed and applied for predicting the wave-induced motions of a ship navigating with a small drift angle in waves. As for the numerical procedure of solutions, the double-body flow accounting for the trailing vortices effect is first evaluated ...
ABSTRACT Moonpool added resistance is a practical problem in drillship design. In the past, studies are more focused on calm water resistance but few attempts on wave added resistance. In this study, CFD simulations are performed for a drillship with a large moonpool opening to evaluate its resistance ...
ABSTRACT In the present work, ship propulsion performance at different trim angles are investigated. CFD method with dynamic overset grid technique is used to direct simulate the free running ship model. The self-propulsion with design ship speed Fr=0.20 is firstly conducted and the predicted results ...
ABSTRACT This paper introduces a BHA with integrated casing cutting and fishing tools applied in offshore operations of well abandonment. This kind of tool systems successfully applied in an offshore project of permanent abandoned wells. The advantage of the system is the combination of both cutting ...
ABSTRACT In this paper, a fully Lagrangian meshless method is developed to solve the fluid–structure interaction (FSI) problem. The improved Moving Particle Semi-implicit (MPS) method is applied to simulate the incompressible fluid flow, while the Finite Element Method (FEM) is introduced to predict ...
ABSTRACT Seakeeping is a very important indicator for ship performance, the shape of ship is the key factor that affects seakeeping, many researchers have been done a lot of work about it. In this paper, a bow lines optimization method using deep learning and (1+1)-evolution strategy, which are two ...
ABSTRACT We developed a μ-ASV mounted on a surfboard for coastal surveys and routine tasks. We aimed for an ASV that can be transported by car though out in Japan by reducing the overall length to about 2m and weight to 45kg. Since the basics of this system were completed, we conducted a step response ...
Monitoring and predicting fishing activity is important for the fishery resource management and the maritime traffic safety. In this paper, we trained deep learning models by grid images from satellite observations to predict areas of fishing activity in next three-day period. The best model predicted ...
Simple Summary Capture fisheries are reaching their limit, so the increasing demand for fish protein can only be met through aquaculture. One attractive sector within this industry is the culture of salmonids, which are a) uniquely under pressure due to overfishing and b) the most valuable finfish ...
ABSTRACT A well-validated 2D hydrodynamic and salinity transport model is established in the Yangtze River Estuary (YRE). The numerical performances reveal that: (1) the highest salinity generally occurs after 1h of the flood current slack in the YRE. (2) The pattern of salinity front in the South ...
ABSTRACT Wave in the water of western Bay of Bengal was hindcasted using nesting SWAN system for the first time for the cyclone Thane during 25-30 December, 2011. The model results were validated by measured buoy data of Pondicherry and BD11. Simulation results showed reasonable agreement with the ...
ABSTRACT In coastal waters, algal blooms (the rapid growth of microscopic phytoplankton) are often observed. The resulting oxygen depletion and even poisoning make local fisheries suffer severe damages. The dynamics of harmful algal blooms (HABs) are poorly understood. Novel models applying unstructured ...
ABSTRACT Currently sea desert due to overabundance of sea urchins is occurring worldwide. Iso-yake means the desertlike state of the sea without seaweed. In Japan, such damage is severe, causing an adverse adversely affecting effect on coastal fisheries and the environment. In particular, along the ...
ABSTRACT A basic paradigm of typhoon risk analysis was proposed, which involves the probability distribution of disaster intensity and the disaster loss rate curve. The expected risk value was calculated by integrating the product of these two terms. The innovation lies in the frequency of disasters ...
ABSTRACT Offshore aquaculture structures such as kelp farm are exposed to environmental loads including winds, waves and currents. A proper design of main components and mooring system, making the structure have sufficient strength capacity withstand the ultimate, accidental and fatigue loads. Additionally, ...