Details
| Original language | English |
|---|---|
| Pages (from-to) | 54-60 |
| Number of pages | 7 |
| Journal | Journal of Ocean and Wind Energy |
| Volume | 2 |
| Issue number | 1 |
| Publication status | Published - 1 Feb 2015 |
Abstract
In the near future, several offshore wind farms are planned to be erected in the German North Sea. Monopile foundations are often a favorable solution to transfer environmental loads into the subsoil. In most cases, the Serviceability Limit State (SLS) proof is design-driving, i.e., compliance with admissible deflections or rotations of the monopile is key. A crucial point herein is the required limitation of cyclically accumulated irreversible rotations of the pile head due to operational constraints of the wind turbine. Since several design solutions fulfill the technical demands, the most important issue in monopile design is the determination of a suitable monopile geometry, i.e., the diameter D and the embedded length L, which also fulfills economic demands. An optimization analysis was conducted with respect to the geotechnical design requirements and the economic criteria for two optimization targets, namely the minimum pile mass and a combination of the pile mass and the embedded pile length. An optimum slenderness ratio L/D is presented as a function of the required accumulated rotation, system dimensions, and number of cyclic loads. With the presented results, a monopile design can be obtained that fulfills both geotechnical and economic demands.
Keywords
- Laterally loaded pile, Optimized design, Pareto optimization, Serviceability limit state, Stiffness degradation method
ASJC Scopus subject areas
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Environmental Science(all)
- Water Science and Technology
- Energy(all)
- Energy Engineering and Power Technology
- Engineering(all)
- Ocean Engineering
Sustainable Development Goals
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Journal of Ocean and Wind Energy, Vol. 2, No. 1, 01.02.2015, p. 54-60.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Optimum geometry of monopiles with respect to the geotechnical design
AU - Schmoor, Kirill Alexander
AU - Achmus, Martin
PY - 2015/2/1
Y1 - 2015/2/1
N2 - In the near future, several offshore wind farms are planned to be erected in the German North Sea. Monopile foundations are often a favorable solution to transfer environmental loads into the subsoil. In most cases, the Serviceability Limit State (SLS) proof is design-driving, i.e., compliance with admissible deflections or rotations of the monopile is key. A crucial point herein is the required limitation of cyclically accumulated irreversible rotations of the pile head due to operational constraints of the wind turbine. Since several design solutions fulfill the technical demands, the most important issue in monopile design is the determination of a suitable monopile geometry, i.e., the diameter D and the embedded length L, which also fulfills economic demands. An optimization analysis was conducted with respect to the geotechnical design requirements and the economic criteria for two optimization targets, namely the minimum pile mass and a combination of the pile mass and the embedded pile length. An optimum slenderness ratio L/D is presented as a function of the required accumulated rotation, system dimensions, and number of cyclic loads. With the presented results, a monopile design can be obtained that fulfills both geotechnical and economic demands.
AB - In the near future, several offshore wind farms are planned to be erected in the German North Sea. Monopile foundations are often a favorable solution to transfer environmental loads into the subsoil. In most cases, the Serviceability Limit State (SLS) proof is design-driving, i.e., compliance with admissible deflections or rotations of the monopile is key. A crucial point herein is the required limitation of cyclically accumulated irreversible rotations of the pile head due to operational constraints of the wind turbine. Since several design solutions fulfill the technical demands, the most important issue in monopile design is the determination of a suitable monopile geometry, i.e., the diameter D and the embedded length L, which also fulfills economic demands. An optimization analysis was conducted with respect to the geotechnical design requirements and the economic criteria for two optimization targets, namely the minimum pile mass and a combination of the pile mass and the embedded pile length. An optimum slenderness ratio L/D is presented as a function of the required accumulated rotation, system dimensions, and number of cyclic loads. With the presented results, a monopile design can be obtained that fulfills both geotechnical and economic demands.
KW - Laterally loaded pile
KW - Optimized design
KW - Pareto optimization
KW - Serviceability limit state
KW - Stiffness degradation method
UR - http://www.scopus.com/inward/record.url?scp=85015659941&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:85015659941
VL - 2
SP - 54
EP - 60
JO - Journal of Ocean and Wind Energy
JF - Journal of Ocean and Wind Energy
SN - 2310-3604
IS - 1
ER -