• Structural Engineering and Mechanics
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• v.13 no.3
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• pp.345-353
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• 2002

Three noded plate and shell finite element and 3D beam element in conjunction with Lanczos method are used for studying the effect of boat tail angle on the free vibration characteristics of a typical payload fairing for three different cylinder diameters with height to diameter ratio 1.5. Configurations without boat tail structural member are also studied. One half of the one side fairing structure is considered for the analysis and symmetric boundary conditions are used.

• 한국기계연구소 소보
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• s.10
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• pp.63-77
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• 1983

This paper presents the hydrodynamic performance characteristics of a planing boat which was tested with a new dynamometer system specifically designed to measure towing force along the thrust plane, the change in trim angle and the vertical displacement of the model center of gravity from still water condition. The test conditions include systematic variations in the three positions of LCG and the three load coefficients of a high speed planing boat.

• Bulletin of the Korean Chemical Society
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• v.29 no.7
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• pp.1369-1373
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• 2008

A stable twist boat conformation of thiane S-oxide 1a in solid state and in solution was unambiguously determined by single crystal X-ray crystallography and solution NMR analyses. On the contrary, the thiane Sdioxide 2 which was obtained from the oxidation of corresponding thiane S-oxide 1a was confirmed to adopt a regular chair conformation.

• Journal of the Society of Naval Architects of Korea
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• v.34 no.1
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• pp.87-92
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• 1997

This study was carried out to develop the initial hull form for G/T 89ton class fishing boat cooperatively with Korean Fishing Boat Association. 1be resistance performance of two basic hull forms of hard chine type and displacement type are compared experimentally.

• Journal of Digital Convergence
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• v.11 no.2
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• pp.407-412
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• 2013

The design trend of leisure boat has been developed through interrelation of maritime culture and ships. We studied the design trend of leisure boat of several countries with advanced maritime culture and proposed digital design process of electric boat exterior that could reflect sensibilities of Korean customers. The result could be useful to domestic small and medium-scale shipbuilders currently face global financial recession and new challenge to focus on development of eco-friendly leisure ships.

• Journal of Navigation and Port Research
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• v.40 no.5
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• pp.231-239
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• 2016

In general, the attitude of a high-speed planning boat changes following a speed change. Since the hydrodynamic forces acting on a ship differ according to the change of its underwater shape, it is difficult to estimate its hydrodynamic force compared to that of a large commercial ship. In this paper, 6 Degrees Of Freedom (DOF) equations of motion that express the maneuvering motion of a planning boat are modeled by analyzing its motion characteristics based on various sea trial tests. Finally, a maneuvering simulation is carried out and a validation of the equations of motion is confirmed with the results of sea trial tests.

• Journal of Advanced Marine Engineering and Technology
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• v.32 no.8
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• pp.1208-1214
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• 2008

The propulsion type of a small boats mainly were divided that the In-board and In out-board position located engine. The boats of the In-board and In out-board engine individually were propelled by propeller and stern drive. In this paper, 39feet-class leisure boats with propulsion type of In-board and In.out-board engine were performed to compare the effect of resistance performance using model test. As a result, leisure boat with In out-board engine is ascertained the optimum boat affects the speed and fuel efficiency.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2003.10a
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• pp.177-181
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• 2003

Despite various forms have been developed and applied to ship hull forms, the superiority of hard chine type over other forms of fishing boat has been recognized so far. As one of the ways of forms for new concept fishing boat, this paper presents the result of a performance evaluation for newly developed forms of hull, appendage and deck house, which features that have esthetic forms.

• The KSFM Journal of Fluid Machinery
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• v.16 no.2
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• pp.5-9
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• 2013

The aim of present study is to evaluate the stability of GM(Metacentric Height) calculation and investigate the damping effect of free rolling test. Moreover, GZ(Righting arm in stability) curve shows that it can provide reasonable design conditions for Fish boat. The roll damping characteristics of the improved model for an 7.9 ton class fishing boat are investigated through the free roll test in towing tank. The safety and boarding sensitivity are evaluated by GM calculation and roll motion period. Therefore, the results in this paper describe that the effect for improved hull is more improved than the original hull.

• Proceedings of the KWS Conference
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• v.43
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• pp.213-215
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• 2004

Water jet propulsion system has high efficiency on middle to high speed, and it provides better safety than conventional screw propeller because it has not projected propeller and rudder. So many leisure boat and high-speed ferries use this propulsion system. We developed water-jet propulsion unit for small planning boat, and launched that in the boat, after that we tested water-jet unit in the lake. As a result, we certify heat dissipation at the bearing housing and reverse duct's shape for neutral position are important at the design, and alignment water-jet unit and keel line are important at the launching, and ship's resistance performance and jet's propulsion performance also are needed to consideration.