Ice Loading on Ship Hull

One of the phenomena restricting the tanker navigation in shallow waters is reduction of under keel clearance in the terms of sinkage and dynamic trim that is called squatting. According to the complexity of flow around ship hull, one of the best methods to predict the ship squat is experimental approach based on model tests in the towing tank. In this study model tests for tanker ship model had been held in the towing tank and squat of the model are measured and analyzed. Based on experimental results suitable formulae for prediction of these types of ship squat in fairways are obtained.

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Numerical Simulation of the Free-Surface Turbulent Flow around a VLCC Ship Hull

10.1063/1.2790231 ◽

2007 ◽

Cited By ~ 2

Author(s):

Adrian Lungu ◽

Theodore E. Simos ◽

George Psihoyios ◽

Ch. Tsitouras

Keyword(s):

Numerical Simulation ◽

Free Surface ◽

Turbulent Flow ◽

Ship Hull

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Quasi-developable -spline surfaces in ship hull design

Computer-Aided Design ◽

10.1016/j.cad.2007.04.004 ◽

2007 ◽

Vol 39 (10) ◽

pp. 853-862 ◽

Cited By ~ 25

Author(s):

F. Pérez ◽

J.A. Suárez

Keyword(s):

Ship Hull ◽

Spline Surfaces ◽

Hull Design

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Implementation of an executable business process management model for the ship hull production design process

Journal of Marine Science and Technology ◽

10.1007/s00773-013-0238-x ◽

2013 ◽

Vol 19 (2) ◽

pp. 170-184 ◽

Cited By ~ 2

Author(s):

Myeong-Jo Son ◽

Tae-wan Kim

Keyword(s):

Design Process ◽

Business Process ◽

Business Process Management ◽

Process Management ◽

Ship Hull ◽

Management Model

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Residual Stress on Ship Hull Structure

Journal of Ship Production ◽

10.5957/jsp.1998.14.4.277 ◽

1998 ◽

Vol 14 (04) ◽

pp. 277-286

Author(s):

Yasuhisa Okumoto

Keyword(s):

Residual Stress ◽

Residual Stresses ◽

Ship Hull ◽

Ship Structure ◽

Heat Process ◽

Steel Material ◽

Hull Structure ◽

Hull Strength

It is well known that ship structure experiences residual stresses due to heat process of steelmaking and assembly (cutting, bending, welding, straightening, etc.), and that these stresses affect ship hull strength. However, such stresses are usually not considered in strength calculations, because they are quantitatively ambiguous. This paper reviews the residual stresses in ship hull structure in accordance with each production step, including steel material, with reference to past measurements and analyses.

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Application of a Boundary Element Method in the Prediction of Unsteady Blade Sheet and Developed Tip Vortex Cavitation on Marine Propellers

Journal of Ship Research ◽

10.5957/jsr.2004.48.1.15 ◽

2004 ◽

Vol 48 (01) ◽

pp. 15-30

Author(s):

Hanseong Lee ◽

Spyros A. Kinnas

Keyword(s):

Boundary Element Method ◽

Boundary Element ◽

Pressure Fluctuations ◽

Ship Hull ◽

Tip Vortex ◽

Tip Vortex Cavitation ◽

Marine Propellers ◽

Sheet Cavitation ◽

Numerical Predictions ◽

Element Method

Most marine propellers operate in nonaxisymmetric inflows, and thus their blades are often subject to an unsteady flow field. In recent years, due to increasing demands for faster and larger displacement ships, the presence of blade sheet and tip vortex cavitation has become very common. Developed tip vortex cavitation, which often appears together with blade sheet cavitation, is known to be one of the main sources of propeller-induced pressure fluctuations on the ship hull. The prediction of developed tip vortex cavity as well as blade sheet cavity is thus quite important in the assessment of the propeller performance and the corresponding pressure fluctuations on the ship hull. A boundary element method is employed to model the fully unsteady blade sheet (partial or supercavitating) and developed tip vortex cavitation on propeller blades. The extent and size of the cavity is determined by satisfying both the dynamic and the kinematic boundary conditions on the cavity surface. The numerical behavior of the method is investigated for a two-dimensional tip vortex cavity, a three-dimensional hydrofoil, and a marine propeller subjected to nonaxisymmetric inflow. Comparisons of numerical predictions with experimental measurements are presented.

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