Abstract
A diffraction-radiation analysis is usually required when the hydrodynamic interactions between structural members occur in short waves. For bracings or small cylinder members, which play important roles in the vicinity of the natural frequency of a floating platform, special care should be taken into account for the effect of viscous damping. Two hybrid panel-stick models are therefore developed, through the combination of the standard diffraction-radiation method and the Morison's formulae, while considering the effect of small members differently. The fluid velocity is obtained directly by the panel model. The viscous fluid force is calculated for individual members by the stick model. A semi-submersible type platform with a number of fine cylindrical structures, which is designed as a floating foundation for multiple wind turbines, is analysed as a numerical example. The results show that viscous force has large influence on the behaviour of the floating body and can successfully be considered by the proposed hybrid models.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 25th International Ocean and Polar Engineering Conference, ISOPE 2015 |
| Publisher | International Society of Offshore and Polar Engineers |
| Pages | 340-345 |
| Number of pages | 6 |
| ISBN (Electronic) | 9781880653890 |
| Publication status | Published - Jan 1 2015 |
| Event | 25th International Ocean and Polar Engineering Conference, ISOPE 2015 - Kona, Big Island, United States Duration: Jun 21 2015 → Jun 26 2015 |
Publication series
| Name | Proceedings of the International Offshore and Polar Engineering Conference |
|---|---|
| Volume | 2015-January |
| ISSN (Print) | 1098-6189 |
| ISSN (Electronic) | 1555-1792 |
Other
| Other | 25th International Ocean and Polar Engineering Conference, ISOPE 2015 |
|---|---|
| Country | United States |
| City | Kona, Big Island |
| Period | 6/21/15 → 6/26/15 |
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All Science Journal Classification (ASJC) codes
- Energy Engineering and Power Technology
- Ocean Engineering
- Mechanical Engineering
Cite this
Hydrodynamic analysis of a semi-submersible FOWT by hybrid panel-stick models. / Liu, Yingyi; Hu, Changhong; Makoto, Sueyoshi; Iwashita, Hidetsugu.
Proceedings of the 25th International Ocean and Polar Engineering Conference, ISOPE 2015. International Society of Offshore and Polar Engineers, 2015. p. 340-345 (Proceedings of the International Offshore and Polar Engineering Conference; Vol. 2015-January).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Hydrodynamic analysis of a semi-submersible FOWT by hybrid panel-stick models
AU - Liu, Yingyi
AU - Hu, Changhong
AU - Makoto, Sueyoshi
AU - Iwashita, Hidetsugu
PY - 2015/1/1
Y1 - 2015/1/1
N2 - A diffraction-radiation analysis is usually required when the hydrodynamic interactions between structural members occur in short waves. For bracings or small cylinder members, which play important roles in the vicinity of the natural frequency of a floating platform, special care should be taken into account for the effect of viscous damping. Two hybrid panel-stick models are therefore developed, through the combination of the standard diffraction-radiation method and the Morison's formulae, while considering the effect of small members differently. The fluid velocity is obtained directly by the panel model. The viscous fluid force is calculated for individual members by the stick model. A semi-submersible type platform with a number of fine cylindrical structures, which is designed as a floating foundation for multiple wind turbines, is analysed as a numerical example. The results show that viscous force has large influence on the behaviour of the floating body and can successfully be considered by the proposed hybrid models.
AB - A diffraction-radiation analysis is usually required when the hydrodynamic interactions between structural members occur in short waves. For bracings or small cylinder members, which play important roles in the vicinity of the natural frequency of a floating platform, special care should be taken into account for the effect of viscous damping. Two hybrid panel-stick models are therefore developed, through the combination of the standard diffraction-radiation method and the Morison's formulae, while considering the effect of small members differently. The fluid velocity is obtained directly by the panel model. The viscous fluid force is calculated for individual members by the stick model. A semi-submersible type platform with a number of fine cylindrical structures, which is designed as a floating foundation for multiple wind turbines, is analysed as a numerical example. The results show that viscous force has large influence on the behaviour of the floating body and can successfully be considered by the proposed hybrid models.
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UR - http://www.scopus.com/inward/citedby.url?scp=84944687107&partnerID=8YFLogxK
M3 - Conference contribution
T3 - Proceedings of the International Offshore and Polar Engineering Conference
SP - 340
EP - 345
BT - Proceedings of the 25th International Ocean and Polar Engineering Conference, ISOPE 2015
PB - International Society of Offshore and Polar Engineers
ER -