Details
| Original language | English |
|---|---|
| Article number | 1116 |
| Number of pages | 14 |
| Journal | Journal of Marine Science and Engineering |
| Volume | 12 |
| Issue number | 7 |
| Publication status | Published - 2 Jul 2024 |
Abstract
The structural design of offshore wind turbines is dominated by environmental conditions such as wind and waves, in addition to deadweight loads and loads from operation. Probabilistic combination approaches exist for the ultimate limit state (ULS) to estimate the simultaneous occurrence of extreme meteorological and oceanographic (metocean) environmental conditions at the site of an offshore wind turbine. The site-specific direction of action of the load parameters is mostly neglected in these approaches; the design of offshore wind turbines in the ULS is usually carried out for the most structurally unfavourable directional superposition of load parameters—which is not based on physical principles and wastes potential material savings. The reasons for different load parameters in different directions of action are the influences of nearby land masses and the topographic shape of the sea floor, atmospheric air circulation, and marine current systems. In this paper, wind and sea state data from the coastDat-2 WAM database are statistically analysed for two sites in the North Sea, common environmental contours are estimated using the example of significant wave height and wind speed, and the site-specific influence of the direction of the load parameters on the environmental contours are investigated. It is shown that, depending on the site under consideration, the direction of action can significantly influence the metocean environmental conditions and that direction-resolved probabilistic combination approaches can contribute to a safe and economic structural design of offshore wind turbines.
Keywords
- combination of wind and waves, directionality, environmental contours, joint distribution, probabilistic methods
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Environmental Science(all)
- Water Science and Technology
- Engineering(all)
- Ocean Engineering
Sustainable Development Goals
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In: Journal of Marine Science and Engineering, Vol. 12, No. 7, 1116, 02.07.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Analysing the Directional Dependence of Wind and Wave Interactions for Offshore Wind Turbines Using Environmental Contours
AU - Kaliske, Malte
AU - Schmidt, Boso
N1 - Publisher Copyright: © 2024 by the authors.
PY - 2024/7/2
Y1 - 2024/7/2
N2 - The structural design of offshore wind turbines is dominated by environmental conditions such as wind and waves, in addition to deadweight loads and loads from operation. Probabilistic combination approaches exist for the ultimate limit state (ULS) to estimate the simultaneous occurrence of extreme meteorological and oceanographic (metocean) environmental conditions at the site of an offshore wind turbine. The site-specific direction of action of the load parameters is mostly neglected in these approaches; the design of offshore wind turbines in the ULS is usually carried out for the most structurally unfavourable directional superposition of load parameters—which is not based on physical principles and wastes potential material savings. The reasons for different load parameters in different directions of action are the influences of nearby land masses and the topographic shape of the sea floor, atmospheric air circulation, and marine current systems. In this paper, wind and sea state data from the coastDat-2 WAM database are statistically analysed for two sites in the North Sea, common environmental contours are estimated using the example of significant wave height and wind speed, and the site-specific influence of the direction of the load parameters on the environmental contours are investigated. It is shown that, depending on the site under consideration, the direction of action can significantly influence the metocean environmental conditions and that direction-resolved probabilistic combination approaches can contribute to a safe and economic structural design of offshore wind turbines.
AB - The structural design of offshore wind turbines is dominated by environmental conditions such as wind and waves, in addition to deadweight loads and loads from operation. Probabilistic combination approaches exist for the ultimate limit state (ULS) to estimate the simultaneous occurrence of extreme meteorological and oceanographic (metocean) environmental conditions at the site of an offshore wind turbine. The site-specific direction of action of the load parameters is mostly neglected in these approaches; the design of offshore wind turbines in the ULS is usually carried out for the most structurally unfavourable directional superposition of load parameters—which is not based on physical principles and wastes potential material savings. The reasons for different load parameters in different directions of action are the influences of nearby land masses and the topographic shape of the sea floor, atmospheric air circulation, and marine current systems. In this paper, wind and sea state data from the coastDat-2 WAM database are statistically analysed for two sites in the North Sea, common environmental contours are estimated using the example of significant wave height and wind speed, and the site-specific influence of the direction of the load parameters on the environmental contours are investigated. It is shown that, depending on the site under consideration, the direction of action can significantly influence the metocean environmental conditions and that direction-resolved probabilistic combination approaches can contribute to a safe and economic structural design of offshore wind turbines.
KW - combination of wind and waves
KW - directionality
KW - environmental contours
KW - joint distribution
KW - probabilistic methods
UR - http://www.scopus.com/inward/record.url?scp=85199625080&partnerID=8YFLogxK
U2 - 10.3390/jmse12071116
DO - 10.3390/jmse12071116
M3 - Article
AN - SCOPUS:85199625080
VL - 12
JO - Journal of Marine Science and Engineering
JF - Journal of Marine Science and Engineering
IS - 7
M1 - 1116
ER -