ULTIMO AGGIORNAMENTO BANCA DATI: 13/09/2024 13:00:57
ABSTRACT The purpose of this study is not only to investigate the impacts of mooring line failure for box-shape aquaculture net cages but also to propose an improved solution to prevent this event occurred. In this study, three different scenarios including central mooring line failure, lateral mooring ...
ABSTRACT Saturation diving has been widely used in various underwater operations, because of its danger, operators need to maintain long-term training to improve their familiarity with the operation process. To meet this requirement, a set of saturated diving simulation training system is designed ...
ABSTRACT Drag reduction by superhydrophobic surfaces has become a research focus in recent years. However, in some cases, the use of superhydrophobic surfaces has led to increased drag. Whether superhydrophobic surfaces on macroscopic objects reduce drag needs further research. The surface adhesion ...
ABSTRACT To analyze tsunami risk in detail, drift damage should be considered using numerical tsunami simulations. However, no validation method for drift simulation has been established. This study proposes a validation method for drift simulation based on analysis of the actual drift of ships during ...
ABSTRACT Zigzag maneuver is one of the typical tests to estimate the ship maneuverability. Most current studies of zigzag maneuver use the simplified model, which cannot resolve the detailed flows around the maneuvering ship. Therefore, simulations of free running ship model with direct rotating propellers ...
ABSTRACT A Subsea Isolation Valve (SSIV) creates a safety barrier in case one needs to shut down a part of a flow line/pipeline, which is first installed at the fixed platform in China sea for Liwan 3–1 project. The primary function of this SSIV is to protect the health, safety and environment from ...
ABSTRACT Ships voyaging through polar areas and tropical waters suffer different ambient temperatures, which leads to a consequence that the extreme temperature of local hull structures can range from −60 °C to 80 °C. Mechanical and thermal properties of carbon steel vary as the temperature changes. ...
ABSTRACT The river mouth delta of this study is located on the center of the eastern coast of Ariake Bay, Kumamoto, Japan. Two earthquakes scaled of 7 on the Japanese scale struck Kumamoto Prefecture on April 14 and 16, 2016, and then about the 0.4 m ground subsidence was occurred. A large amount of ...
ABSTRACT The objective of the present study is to assess the ultimate hull girder strength taking the section modulus into account under longitudinal bending. A Ro-Ro Ship is taken as object ship. A Ro-Ro Ship has a unique character because most of the longitudinal elements locate above neutral axis. ...
ABSTRACT At present, most of ship hull form optimization design is based on deterministic parameters. However, in the actual engineering problem, there are many unavoidable uncertain factors. For instance, the ship speed may vary around the design speed due to wind, waves, flow and other environmental ...
ABSTRACT The research on the effect of coastal facilities for protecting an estuary from channel blockage and a coast from beach erosion by waves demands to understand wave propagation, a nearshore current and sediment transportation. The purpose of this research is to evaluate the effect of jetties ...
ABSTRACT Effects of surface roughness and fouling on ship resistance are analyzed by numerical simulation, the fouling covered on hull are graded through the visual inspection, three different hull surface conditions are divided corresponding to three models used to simulate by FLUENT software through ...
ABSTRACT In the past, traditional methods of research on ship maneuvering performance were estimated in calm waters. However, the course-keeping ability and the maneuvering performance of a ship can be influenced by the presence of waves. Therefore, it is necessary to understand the maneuvering behavior ...
ABSTRACT To measure the discharge and three-dimensional flow including the velocity, acoustic Doppler current profilers (ADCP) has been used widely. When using ADCP in a river with a low velocity where the velocity is lower than a lowest boat speed, it is difficult to acquire the accurate result without ...
ABSTRACT Large container ships have very flexible hulls resulting in low natural frequencies, causing the hull vibrations stimulated more easily when sailing. So the elastic effect of wave loads is obvious. And because of the large flare of bow, slamming occurs frequently. Hence, the non-linear effect ...
ABSTRACT Corrosion in seagoing vessels is an unavoidable phenomenon which affects the physical life and safety of the hull structures. Conventionally corrosion margins are introduced to cope with the problems of corrosion and wear. Since the phenomena of corrosion and wear of structural hull members ...
ABSTRACT In this paper, the KCS is considered as the parent ship. The single-objective genetic algorithm is taken as the optimization technique leading to an optimal ship considering full speed range. In order to validate and analyze the optimization results, numerical calculation of the optimal ship ...
ABSTRACT Seakeeping is a key standard to examine whether a ship has good performance in waves. Ship hull forms can significantly affect the motion behavior in waves and the influences vary a lot under different wave conditions. Therefore, it is necessary to conduct the multiobjective optimization design ...
ABSTRACT An improved numerical method for calculation of icebreaking force is proposed in this paper. First, the dynamic bending failure criterion is introduced considering the loading rate, which is of great significance to the icebreaking process. The parametric expression of the dimensionless coefficient ...
ABSTRACT Time domain ship motion based on 3D Transient Green's Function method (3DTGF) is established, in which the impulse response theory is employed and the memory effect part of hydrodynamic forces is solved by 3DTGF incorporated with high-order boundary element method (HOBEM). The motions of Wigley-III ...