| Research |
Period |
Researcher(s) |
Overview |
| Plan |
2002 |
| 1. Developing a propeller arranged wing sideways
by applying the oar principle |
2 |
1 |
M. Ikehata H. Kai |
The properties of oars of Japanese boats are not inferior
to screw propellers. Propellers arranged with their wings sideways using the oar
principle are developed. |
| 2. Control of wave breaking phenomena with appendages
on an enlarged ship front |
3 |
3 |
K. Suzuki |
Control of wave breaking phenomena and the possibility of
decreasing wave-breaking resistance is experimentally studied using a spiked appendage
on an enlarged ship front. |
| 3. Decreasing wave-making resistance of catamarans
using a bulb between twin hulls |
3 |
3 |
K. Suzuki |
Decreasing wave-making resistance in a high velocity range
by a bulb arranged midway between twin hulls of a catamaran is experimentally
studied using numerical calculation of the paneling method. |
| 4. Decreasing wave-making resistance with a lifting-type
appendage in an inclined stem ship |
3 |
2 |
K. Suzuki |
Decreasing wave-making resistance using wingtype appendages
in an inclined stem ship, which cannot be equipped with a projection-type bulb,
is investigated through experiment and numerical calculation. |
| 5. Paneling method considering trim and sinkage |
4 |
1 |
K. Suzuki |
Free surface flow analyzing codes using the paneling method,
which was developed considering the effects of trim and sinkage, is studied by
applying them to an actual ship, considering shallow water effect and optimizing
ship type. |
| 6. Numerical computation for fluid dynamics using
the particle method |
3 |
1 |
H. Kai |
The particle method, which is a solving method of the Navier-Stokes
equation using non-lattice, is applied to circle and other two-dimensional bodies.
The finite volume method representative to solve using lattice, which has already
been developed and applied, and the experimental results is compared with the
particle method. |
| 7. Composite improvement of seaworthiness |
4 |
4 |
T. Hirayama |
Long-term prediction based on long period wave data for ship
motion and increasing resistance is studied and an improved method of seaworthiness
is proposed. |
| 8. Study on improvement for taking off and landing
on water of flying boat |
4 |
4 |
T. Hirayama |
Guidance system for taking off from flying boats is developed
using a long tank, and improving seaworthiness quality using numerical simulation
is investigated. |
| 9. Estimation method for flow directional spectrum |
4 |
4 |
T. Hirayama |
Estimation method for the flow directional spectrum for experimental
tanks and the actual sea is developed and put to practical use. |
| 10. Active displacement control for large floating
structures in waves |
4 |
3 |
T. Hirayama |
An air control method developed for a super large floating
model is further put to practical use. |
| 11. Improving the rolling control system of a
super high speed vessel |
4 |
3 |
T. Hirayama |
The quality a new rolling control system already proposed
is improved and put to practical use. |
| 12. The mean increase in resistance in waves |
4 |
3 |
T. Hirayama |
The character of the mean increase in resistance in waves
is studied and a control method for increase is investigated. |
| 13. Developing structural analysis using a weight
function |
6 |
4 |
Y. Sumi |
Response of a multi-loading system for fatigue and parts of
a ship's structure at risk is efficiently analyzed using a numerical weight function. |
| 14. Simulation of a fatigue crack propagation
mode |
3 |
2 |
Y. Sumi |
Crack phenomena in the crack propagating part of a ship and
the offshore structure is investigated using numerical simulation, and the effects
of statically indeterminate in structure, residual welding stress and the detailed
shape of the structure is studied. |
| 15. Control of propagating phenomena and harmless
fatigue cracks |
4 |
2 |
Y. Sumi |
Fatigue cracks initiated and propagated in ships and offshore
structures will be controlled by a propagating path. A structural detail, in which
fatigue cracks do not produce fatal damage, is developed. |
| 16. Strength evaluation of corroded steel plate |
6 |
4 |
Y. Sumi |
The relation between stress concentration with the irregular
surfaces of corroded steel plate and critical paths of cracking are studied. The
macroscopic mechanism of decreasing ductility is investigated and a quantitative
estimation is developed. |
| 17. Applying adaptive meshing and optimizing ship
structure analysis |
3 |
3 |
Y. Sumi |
Adaptive meshing for stress-concentrated parts of a ship's
structure is studied according to international cooperative bench-mark calculation.
The applicability of a structure optimization method is also investigated. |
| 18. An automatic generating method of a hexahedral
element for analyzing ship structure |
3 |
2 |
Y. Kawamura |
An automatic mesh-generating method using a whisker weaving
algorithm and element shape modification is developed. |
| 19.Preservation information system for ship structure |
3 |
2 |
Y. Kawamura |
An information system for preserving sound ship structure
according to the STEP technique is developed and a supporting technique for ship
inspection based on the information system will progress. |
| 20. The optimum design method for ship structure |
3 |
2 |
M. Arai |
A mathematical method for optimizing ship structure using
plural objective functions such as minimizing hull weight, etc, is studied. |
| 21.Initiating sloshing in exchanging ballast water
at sea |
3 |
2 |
M. Arai |
Cooperative research on initiating sloshing in exchanging
ballast water at sea is under operation by the Japan Ship Research Society. |
| 22. Impact load due to sloshing |
3 |
2 |
M. Arai |
Impact load occurring at collision between fluid and structure
is studied using numerical calculation. |
| 23. Fundamental study on physical distribution
in the sea |
3 |
1 |
M. Arai |
Container freights and transportation networks are optimized. |
| 24. Large floating systems considering several
important factors |
3 |
3 |
M. Murai Y. Inoue M. Arai |
Considering large floating structures that are non-uniform
such as submarine topography, practical structure form, etc., the design of a
composite system that estimates and evaluates hydroelastic response and mooring
force is studied. |
| 25. The dynamic response of large floating structures
with marine environment force |
4 |
2 |
M. Murai |
Dynamic response for environmental force of wind and waves,
seismic ocean waves, seaquakes, etc., acting on large floating structures is investigated. |
| 26. Decreasing hydroelastic response in large
floating structures |
3 |
1 |
M. Murai |
Decreasing hydroelastic response of very large floating structure
estimating method with numerical calculation considering effects of actual structural
form, breakwater and so forth, is developed. |
| 27. Study on a model test of large floating structures
using a very small model |
3 |
3 |
M. Murai |
A model testing method for large floating structures using
nearly one-to-one thousand small model is investigated and the availability of
non-contact optical measurement method is researched and validity of it is investigated. |
