| Research |
Period |
Researcher(s) |
Overview |
| Plan |
2002 |
| 1. Study on developing sea-worthiness in the actual
sea |
5 |
3 |
R. Naitou K. Takagi M. Minoura |
The stem form of small increasing resistance in actual sea
is developed. |
| 2. Study on transformation of wave energy into
ship propulsion energy |
5 |
5 |
R. Naitou K. Takagi M. Minoura |
The transformation process of wave energy into kinetic energy
and into propulsive energy is investigated. |
| 3. Study on formation of wave and control system |
3 |
1 |
R. Naitou K. Takagi M. Minoura |
A new wave tank is investigated to realize actual sea waves
in a limited water area. Hydrodynamic force and floating motion are researched
using the new tank. |
| 4. Study on superfloating behavior |
3 |
3 |
K. Takagi |
The elastic behavior of super-floating is analytically investigated
and a fundamental understanding is developed. |
| 5. Theoretical study on the relaxation of water
shock |
3 |
2 |
K. Takagi |
Water shock pressure is usually estimated by Wagner's theory,
the pressure is in fact relaxed by the effect of elasticity, air inclusion, three
dimensions and compressibility. The relaxation effects are regulated and classified
to design ships and offshore structures. |
| 6. Study on flow around large offshore structures
in closed sea areas |
4 |
4 |
K. Nozawa |
Calculation and indication of tidal current and tide wave
appearing in closed sea areas and the inner areas of bays are studied. There is
a practical evaluation of flow. |
| 7. Study on hydrodynamic vibration of surface
propellers |
3 |
3 |
K. Nozawa |
Fluctuation stress in blades and force excited by fluid force
is studied experimentally, and a foundation devising surface propeller superior
to those with hole performance is realized. |
| 8. Study on developing a new fatigue design technique
on crack propagating analysis |
5 |
2 |
N. Ohsawa |
Wave models that reproduce actual wave height and direction
is constructed and a design technique on the fatigue strength of ship and offshore
structure parts with crack propagating analysis. |
| 9. Analytical study on non-linear wave motion |
5 |
4 |
K. Matsumura |
Non-linear wave motion, for example, as spray that occurs
with the falling shock of high-speed boats is investigated using analytic expression. |
| 10. Modelling dangerous possibilities in maneuvering |
3 |
3 |
K. Matsumura |
Dangerous possibilities perceived by pilots are modeled using
keywords of the Hilbert transformation. |
| 11. Study on variation principle in ship hydrodynamics |
5 |
5 |
K. Matsumura |
A new variation principle is developed considering the attendance
problem in non-stationary and nonl-inear ship hydrodynamics. |
| 12. Study on diffusion phenomena of turbulent
flow energy |
4 |
4 |
H. Suzuki |
A measurement method of pressure diffusion underwater is investigated
and a transport equation model of turbulent flow energy is developed. |
| 13. Analysis of ultimate strength for longitudinal
bending |
5 |
4 |
T. Yao |
An accurate numerical analysis model is studied to estimate
the ultimate strength and the phenomena of stiffened panels. Based on the results
of the numerical analysis, a simple analytical method for calculating the ultimate
strength of ship structure in longitudinal bending is investigated. |
| 14. Study on second order buckling phenomena of
stiffened panels |
4 |
3 |
T. Yao |
Subjecting stiffened panel to thrust, second order buckling
phenomena is investigated, including the effect of the stiffener. A mechanical
model accurately estimating phenomena is developed. |
| 15. Study on the compressive strength of special
panels and stiffened panels |
3 |
2 |
T. Yao S. Mukagy |
The buckling and ultimate strength of curved panels such as
the bilge and the gunwale of a ship and stiffened panels with inclined stiffener
are investigated. |
| 16. Study on suitable modeling for analyzing buckling
and the ultimate strength of stiffened panels |
3 |
3 |
T. Yao S. Mukagy |
Based on the analysis of buckling and the ultimate strength
of stiffened panels, an application model is clarified into the boundary for the
web and flange part of the stiffener as the shell element and as the beam/pillar
element. |
| 17. Theoretical study on the effect of wave-making
damping and viscous damping for ship vibration |
5 |
5 |
S. Hayasi |
The effect of wave-making damping and viscous damping on ship
vibration is studied theoretically. |
| 18. Study on simultaneous optimization of structural
strength and ship vibration level |
3 |
3 |
S. Hayasi |
A simultaneous optimization method is developed for static
strength and vibrating levels of ships, and the results are certified. |
| 19. Study on Eigenvalue shift for optimization
of vibration level |
3 |
3 |
S. Hayasi |
A system is developed and its efficiency is certified to formulate
limit conditions of eigenvalue shift for optimizing vibration level. |
| 20. Study on maneuverability of ships with the
Veck-twin system |
3 |
2 |
K. Hasegawa |
Investigating maneuverability of ships equipped with a special
rudder called the Veck-twin system, a mathematical model is constructed and an
automatic landing control system of ships with rudders is studied. |
| 21. Study on developing a navigation support system
based on the ITS conception of sea |
5 |
3 |
K. Hasegawa |
Systems supporting ship navigation is developed based on the
ITS conception of sea,. |
| 22. Study on maneuverability and stability in
the following wave using non-linear dynamics |
5 |
4 |
N. Umeda |
Non-control maneuvering phenomena (broaching-to), parametric
rolling and capsizing that occur in ships within the following wave are studied
using the non-linear dynamics theory. The mechanical structure of phenomena, initiating
conditions and prevention are clarified. |
| 23. Study on estimating ship motion under survival
conditions at sea |
3 |
2 |
N. Umeda K. Hasegawa |
Computation for estimating ship motion and capsizing under
extreme circumstances, in damaged and non-damaged conditions, is developed through
comparison with the model experiment. |
| 24. Study on an extreme non-linear flow mechanism
using the particle method |
3 |
2 |
S. Naitou |
Stream force that occurs due to extreme non-linear flow of
deck-wetness, slamming and wave breaking is studied using the particle method.
Whether the method is suitable is investigated by experiment. |
| 25. Study on a new fatigue design method for ships
and offshore structures |
4 |
4 |
Y. Tomita S. Hasimoto |
Design method to obtain a fatigue design diagram of ships
and offshore structures is developed using crack propagating analysis. |
| 26. Study on developing a non-destructive fracture
strength evaluation method using magnetic characteristics |
5 |
4 |
S. Hasimoto Y. Tomita |
The relation between magnetic characteristics and fatigue
damage of ferromagnetic material is investigated and a method for estimating remaining
life is developed according to differences in magnetic characteristics. |
| 27. Computer simulation for surface crack propagation
using elastic-plastic FEM |
3 |
1 |
Y. Tomita S. Hasimoto N. Ohsawa |
Computer software that analyzes surface crack propagation
including crack opening and closing behavior is developed. |
| 28. Study on strength evaluation and creation
of material using computer mechanics |
3 |
1 |
N. Ohsawa Y. Tomita |
The formation process of fatigue cracks is analyzed using
computational experiment using elastic and plastic analysis in crystal. Fundamental
knowledge for developing high strength material is obtained. |
| 29. Study on distortion analysis of steel plate
under line heating |
5 |
4 |
Y. Tomita N. Ohsawa S. Hasimoto |
The characteristics of heat transfer from a heating gas flame
to steel plate in line heating are studied experimentally and analytically, and
the relation between heating condition and distortion of the steel plate is investigated. |
| 30. Study on developing numerical computing for
potential flow using the characteristic curve method |
3 |
1 |
H. Suzuki |
Numerical computation using a simultaneous equation between
velocity potential and pressure is developed. |
| 31. Study on developing a new technique for estimating
vibration characteristics in accordance with step by step ship design |
4 |
4 |
S. Hayasi |
A technique for estimating vibration characteristics of ships
is developed using a suitable model with step-by-step ship design features. |
