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Effect of Column Spacing On Wave Force Considering Structure Motion
Morison’s Equation Multiple Pile Transfer Function Columns Optimum Spacing Regular Array Irregular Array Variance Maxima
2009/5/19
The study is of an offshore structure consisting of slender columns near the free surface and large buoyancy pontoons near the base that is moored to the sea bottom like a Tension Leg Platform. The ef...
On Viscous Flow around Marine Propellers—Hub Vortex and Scale Effect—
CFD Propeller Hub Vortex Scale Effect Cavitation
2009/5/18
Recently, the simulation technology by CFD (Computational Fluid Dynamics) has made remarkable progress. The method has become to be applied to viscous flow problems around not only various ship hulls ...
A Consideration on Nonlinear Component of Maneuvering Hydrodynamic Force from Segmented Model Test Results—Effect of Shallow Water—
Maneuverability Hydrodynamic Force Nonlinear Component Segmented Model Shallow Water
2009/5/12
This report presents some experimental results of maneuvering hydrodynamic forces obtained from segmented model tests at finite water depth. The experiments were carried out in order to make clear the...
Characteristics of Longitudinal Motions of a Planing Craft in Head Waves at Very High-Speed—Effect of Surging on Heaving and Pitching—
High-Speed Planing Craft Stability Longitudinal Motion Surge Heave Pitch
2009/5/12
In this study, characteristics of longitudinal motions of a planing craft running at very high-speed in regular head waves are experimentally and theoretically investigated. The results of experiments...
Frictional Drag Reduction by the Nonlinear Effect of an Unsteady Boundary Layer
Drag Reduction Additional Pressure Gradient Apparent Friction Force Skin Friction Flat Plate Unsteady Boundary Layer
2009/5/12
An unsteady boundary layer past an elastic flat plate with a leading fixed edge and a surging trailing edge was investigated utilizing both numerical and analytical methods. Analytical solutions for l...
A Method to Confirm Scale Effect of Stern Waves due to a Transom Stern
Stern Waves Scale Effect Scale Effect Confirmation Method Small Model Ships
2009/5/12
When a ship with a wide immersed transom stern runs on a deeper draft, forward-oriented wave breaking often occurs just behind the transom stern. Stern waves in such condition can be considered to con...
Experimental Study on Scale Effect of Drag Reduction by Microbubbles Using Very Large Flat Plate Ships
Microbubbles Scale Effect Frictional Drag Reduction Very Large Plate Ship
2009/5/12
Using flat plate ships of up to 50m in length in a 400m-long towing tank, we carried out experiments on the scale effect of microbubbles, the aim being to apply microbubbles to full-scale ships. The s...
Effect of Transom Stern Bottom Profile Form on Stern Wave Resistance
Transom Stern Bottom Profile Form Stern Wave Resistance Model Test Small Model Ships
2009/5/12
When a ship with a wide immersed transom stern runs on a deeper draft than its design draft, forward-oriented wave breaking often occurs just behind the transom stern. The phenomenon accompanies large...
A Study on Static Strength of Fillet Welded Joint for Ship Structure-Effect of Inclined Angle, Partial Joint Penetration, Gap
Static Strength Fillet Welded Joint, Inclined Angle Partial Joint Penetration Gap
2009/4/30
The effect of inclined angle on static strength of fillet welded joint for inclined hold frame at forward and afterward hold is studied. In this study normal shear strength of the inclined fillet wel...
Effect of Corrosion on Static Strength of Hull Structural Members (7th Report)
Corrosion Static Strength of Hull Structural Members
2009/4/30
Pitting corrosion is typical corrosion observed on coated hold frames of bulk carriers which exclusively carry coal and iron ore. In order to secure the safety of these types of bulk carriers, it is i...
Effect of Corrosion on Static Strength of Hull Structural Members (6th Report)
Corrosion Static Strength of Hull Structural Members
2009/4/30
The aim of this study is to investigate the effect of pitting corrosion on local strength of hold frames of bulk carriers. In the present study, a series of 3-point bend tests with small structural mo...
The performance of buffer bow structures against collision-2nd report: the effect in preventing oil outflow
buffer bow structures collision preventing oil outflow VLCC
2009/4/30
We still have experienced cargo oil spill from a struck D/H(double hull) tanker like the accident case of “Baltic Carrier (at Denmark in 2001)”. “Buffer Bow” has come to be considered as an innovative...
Effect of Corrosion on Static Strength of Hull Structural Members (9th Report)
Static Strength Hull Structural Members DOP
2009/4/30
The aim of this research project is to establish a method of evaluating the effect of pitting corrosion with a circular cone shape on local strength of hold frames of bulk carriers. In the present stu...
Effect of Corrosion on Static Strength of Hull Structural Members (9th Report)
Corrosion Static Strength of Hull Structural Members DOP
2009/4/29
The aim of this research project is to establish a method of evaluating the effect of pitting corrosion with a circular cone shape on local strength of hold frames of bulk carriers. In the present s...
Effect of Corrosion on Static Strength of Hull Structural Members (8th Report)
Static Strength Hull Structural Members DOP
2009/4/29
The purpose of this research project is to establish a method of evaluating the effect of pitting corrosion with a circular cone shape on local strength of hold frames of bulk carriers. In the present...