Journal of Marine Science and Technology
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Estimation of the hydrodynamic coefficients of the complex-shaped autonomous underwater vehicle TUNA-SAND
Journal of Marine Science and Technology - Tập 14 - Trang 373-386 - 2009
Hydrodynamic coefficients strongly affect the dynamic performance of autonomous underwater vehicles (AUVs). Thus it is important to have the true values of the coefficients in order to simulate the AUV’s dynamic performance accurately. Although these coefficients can be predicted by many methods, most are only applicable for AUVs with streamlined shapes. Computational fluid dynamics (CFD) can be a...... hiện toàn bộ
A novel numerical method for the hydrodynamic analysis of floating bodies over a sloping bottom
Journal of Marine Science and Technology - Tập 26 - Trang 1198-1216 - 2021
A novel numerical method combining Eigenfunction matching method (EMM) and 3D Rankine source method is developed to investigate wave-body interaction over a sloping bottom. The extended EMM is proposed to create an incident wave model over the sloping bottom, thereby obtaining the Froude-Krylov force and Neumann data on wet surfaces of the floating body for the diffraction problem. A 3D Rankine so...... hiện toàn bộ
Elastic response characteristics of a very large floating structure in waves moored inside a reef
Journal of Marine Science and Technology - Tập 8 Số 1 - Trang 1-10 - 2003
This article describes the results of hydraulic model tests of the elastic response of a very large floating structure (VLFS) moored inside a reef in an isolated island. The distributions of strains and vertical displacements due to the elastic response of the VLFS were measured. The response characteristics were strongly affected by deformed nonlinear waves inside the reef. A two-step analytical...... hiện toàn bộ
A multi-objective mathematical model to select fleets and maritime routes in short sea shipping: a case study in Chile
Journal of Marine Science and Technology - Tập 26 - Trang 673-692 - 2020
This paper proposes a mathematical model for intermodal chains with seaborne transport, in which the optimization of a multi-objective model enables conflicting objectives to be handled simultaneously. Through the assessment of ‘door-to-door’ transport in terms of costs, time, and environmental impact, the most suitable maritime route and the optimized fleet are jointly proposed to maximize the op...... hiện toàn bộ
A pseudofield model approach to simulate compartment-fire phenomena for marine fire safety design
Journal of Marine Science and Technology - Tập 8 - Trang 177-184 - 2004
In order to prevent the spread of marine compartment fires, it is necessary to understand the governing factors or characteristics of fire-spread phenomena. We present a pseudofield model approach to this problem. We first described a field model of turbulent heat convection based on a standard k − Ε turbulence model. Two-dimensional numerical simulations of a two-linked compartment fire were carr...... hiện toàn bộ
Wave responses of a coastal cargo ship consisting of unit modules
Journal of Marine Science and Technology - Tập 11 - Trang 260-269 - 2006
This article discusses the dynamic responses of a coastal cargo ship that consists of unit modules with advance forward speed in waves. We introduce a simple way of connecting the modules that has enough capability to link the modular parts of the ship as a unified whole. The flexible connection consists of male and female rubber fenders with additional pretensioned ropes. This kind of connection ...... hiện toàn bộ
Optimization of the horizontal shape of CO2 injected domain and the depths of release in moving-ship type CO2 ocean sequestration
Journal of Marine Science and Technology - Tập 18 - Trang 220-228 - 2012
In moving-ship type CO2 ocean sequestration, liquid CO2 is discharged into a domain in a water column. Since the maximum CO2 concentration that is reached depends on the horizontal shape of the water column and the depths of release, it is very important to optimize these parameters for each injection site in order to minimize the biological impact. We conducted numerical experiments using an offl...... hiện toàn bộ
CO2 ocean sequestration by moving ships
Journal of Marine Science and Technology - Tập 6 - Trang 51-58 - 2001
Ocean sequestration of the CO2 captured from fossil-fuel burning is a possible option to mitigate the increase in CO2 concentration in the atmosphere. It can isolate huge amounts of CO2 from the atmosphere for a long time at relatively low cost, if it is acceptable from the viewpoint of the environmental impact on the ocean. The concept of CO2 dispersion in the ocean depths by ships is a promisin...... hiện toàn bộ
Dynamic analysis of drillship under extreme metocean hurricane condition in ultra-deep water
Journal of Marine Science and Technology - Tập 28 - Trang 784-803 - 2023
Drillships are used for exploratory drilling operations in a water depth above 3000 m. Design variants in the new-generation drillships include flexible internal storage and payload capacity. While their operations are quite satisfactory in moderate weather conditions, response under metocean hurricane conditions to preserve operation versatility poses challenges. The design and operation of drill...... hiện toàn bộ
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