2006 Fiscal Year Final Research Report Summary
Long-term field measurement of a Very Large Floating Structure and development of a rational design method
| Project/Area Number |
17360212
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
|
|---|
| Research Institution | KYOTO UNIVERSITY |
|---|
Principal Investigator |
UTSUNOMIYA Tomoaki Kyoto Univ., Graduate School of Engineering, Associate Professor, 工学研究科, 助教授 (10211773)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
KATO Shunji National Maritime Research Institute, Ocean Space Utilization Group, Head of Group, 海洋空間利用研究グループ, グループ長 (70373412)
SATO Hiroshi National Maritime Research Institute, Ocean Space Utilization Group, Senior Researcher, 海洋空間利用研究グループ, 主任研究員 (70435775)
YUKAWA Kazuhiro National Maritime Research Institute, Ocean Space Utilization Group, Senior Researcher, 海洋空間利用研究グループ, 主任研究員 (80435776)
MASANOBU Sotaro National Maritime Research Institute, Ocean Space Utilization Group, Researcher, 海洋空間利用研究グループ, 研究員 (80373413)
MAEDA Katsuya National Maritime Research Institute, Ocean Space Utilization Group, Researcher, 海洋空間利用研究グループ, 研究員 (90425760)
|
|---|
| Project Period (FY) |
2005 – 2006
|
| Keywords | Very Large Floating Structure / Field measurement / Drift force / Hydroelastic response / Wave response / Multi-directional random wave |
|---|
| Research Abstract |
In this research, the long-term field measurement of wave response of a large floating structure located at Awaji-island was made. The vertical elastic response and the horizontal motion as a moored vessel have been measured, and compared with the simulated values. The vertical hydroelastic responses have been compared in the frequency domain, and a good agreement has been obtained. The horizontal motion has been simulated in the time-domain where the nonlinear mooring restoring force characteristics and the memory effect are considered, and also a good agreement has been obtained, if the clearances at the fenders are adjusted. Basically, the simulation presented in this paper can represent the measured values; however, further improvement to consider the multi-directional irregular sea-state may be necessary.
Then, in FY 2006, the multi-directional irregular waves have been reproduced from the measurement values of current speed and water pressure obtained from the field-measurement. The horizontal motions as a moored vessel have been measured and compared with the simulated values in frequency domain. The results have shown that the significant values for the horizontal motions by the simulation agree well with the measured values, when the multi-directional irregular waves are considered.
|
