| Project/Area Number |
04302036
|
|---|
| Research Category |
Grant-in-Aid for Co-operative Research (A)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
船舶抵抗・運動性能・計画
|
|---|
| Research Institution | Osaka University |
|---|
Principal Investigator |
HAMAMOTO Masami Osaka University, Naval Arch. & Ocean Eng.Prof., 工学部, 教授 (30107130)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
KIJIMA Katsuro Kyushu University, Naval Arch. & Ocean Eng.System Prof., 工学部, 教授 (90038042)
SADAKANE Hiroyuki Univ.of Kobe Mercantile Marine Marine Science Prof., 商船学部, 教授 (80081389)
IKEDA Yoshiho Univ.of Osaka Prefect. Marine System Eng.Prof., 工学部, 助教授 (10117989)
FUJINO Masataka University of Tokyo Naval Arch. & Ocean Eng.Prof., 工学部, 教授 (10010787)
KARASUNO Keiichi Hokkaido University, Faculty of Fisheries Prof., 水産学部, 教授 (80031467)
|
|---|
| Project Period (FY) |
1992 – 1993
|
| Project Status |
Completed (Fiscal Year 1993)
|
| Budget Amount *help |
¥16,000,000 (Direct Cost: ¥16,000,000)
Fiscal Year 1993: ¥6,700,000 (Direct Cost: ¥6,700,000)
Fiscal Year 1992: ¥9,300,000 (Direct Cost: ¥9,300,000)
|
|---|
| Keywords | Ship Motions in Following Waves / Capsizing of Ships / Criteria of Ship Stability / Risk Analysis for Capsizing of Ships |
|---|
| Research Abstract |
In order to clarify the stability indeces leading up to capsizing of a ship in severe following waves, the following research items have been done during the term of this project : 1) An Analysis of a Ship Capsizing in Quatering Seas, 2) Examination of Roll Damping Coefficients and Effective Wave Slope Coefficient for Small Passenger Crafts, 3) Stability Assessment of a Ship by Applying Risk Analysis based on the Capsizing Probability, 4) Preliminary Study Towards a Capsizing Simulator, 5) On the Improvement of Transverse Stability for High-Speed Craft, 6) A New Coordinate System and the Equation Describing Manoeuvring Motion of a Ship in Waves, 7) Time Domain Analysis of Ship Responses in Waves, 8) A Consideration on the Governing Equation of the Ship's Manoeuvering Motion in Waves, 9) A Representation of Asymmetric Waves of Finite Height, 10) A Physical-Mathematical Model of Hydrodynamic Forces and Moment Acting on a Hull During Large Drifting and Turning Motion Under the Conditions of Slow Speed. From this study the following results have been obtained : 1) The practical equations of motions to describe the motions of a ship in severe following waves have been shown from both theoretical and experimental considerations. Various physical mechanism that could be responsible for capsize have been pointed out by numerical experiments. 3) The capsizing simulator which will be helpful to give an operational guidance to avoid capsizing has been completed. 4) The prescribed roll damping and effective wave slope coefficients for small passenger crafts in the current Ship Stability Rule have been investigated.
|
