Details
| Original language | English |
|---|---|
| Pages (from-to) | 151-158 |
| Number of pages | 8 |
| Journal | Energy Procedia |
| Volume | 80 |
| Publication status | E-pub ahead of print - 2 Dec 2015 |
| Event | 12th Deep Sea Offshore Wind R and D Conference, EERA DeepWind 2015 - Trondheim, Norway Duration: 4 Feb 2015 → 6 Feb 2015 |
Abstract
The design of offshore wind turbines is usually based on the semi-probabilistic safety concept. Using probabilistic methods, the aim is to find an advanced structural design of OWTs in order to improve safety and reduce costs. The probabilistic design is exemplified on tubular joints of a jacket substructure. Loads and resistance are considered by their respective probability distributions. Time series of loads are generated by fully-coupled numerical simulation of the offshore wind turbine. Especially the very high stress ranges that rarely occur during a period with constant conditions are decisive for the fatigue design. The peak-over-threshold method is applied to find the probability distribution of the very high stress ranges. The method of maximum-likelihood estimation is used to determine the parameters of the underlying generalized Pareto distribution. Further analysis shows that especially the number of the very high stress ranges, scattering for different time series, has a significant impact on the resulting fatigue damage.
Keywords
- fatigue design, generalized Pareto distribution, jacket substructure, offshore wind energy, peak-over-threshold method, probabilistic analysis, tubular joints
ASJC Scopus subject areas
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In: Energy Procedia, Vol. 80, 02.12.2015, p. 151-158.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Probabilistic fatigue analysis of jacket support structures for offshore wind turbines exemplified on tubular joints
AU - Kelma, Sebastian
AU - Schaumann, Peter
N1 - Funding Information: This study has been carried out within the research project "Probabilistic Safety Assessment of Offshore Wind Turbines", financially supported by the Ministry for Science and Culture in Lower Saxony, Germany. The software used for fully-coupled simulations of OWTs consists of the software Flex5, provided by Senvion SE, and the FE tool Poseidon. The Ministry for Science and Culture in Lower Saxony and Senvion SE are kindly acknowledged.
PY - 2015/12/2
Y1 - 2015/12/2
N2 - The design of offshore wind turbines is usually based on the semi-probabilistic safety concept. Using probabilistic methods, the aim is to find an advanced structural design of OWTs in order to improve safety and reduce costs. The probabilistic design is exemplified on tubular joints of a jacket substructure. Loads and resistance are considered by their respective probability distributions. Time series of loads are generated by fully-coupled numerical simulation of the offshore wind turbine. Especially the very high stress ranges that rarely occur during a period with constant conditions are decisive for the fatigue design. The peak-over-threshold method is applied to find the probability distribution of the very high stress ranges. The method of maximum-likelihood estimation is used to determine the parameters of the underlying generalized Pareto distribution. Further analysis shows that especially the number of the very high stress ranges, scattering for different time series, has a significant impact on the resulting fatigue damage.
AB - The design of offshore wind turbines is usually based on the semi-probabilistic safety concept. Using probabilistic methods, the aim is to find an advanced structural design of OWTs in order to improve safety and reduce costs. The probabilistic design is exemplified on tubular joints of a jacket substructure. Loads and resistance are considered by their respective probability distributions. Time series of loads are generated by fully-coupled numerical simulation of the offshore wind turbine. Especially the very high stress ranges that rarely occur during a period with constant conditions are decisive for the fatigue design. The peak-over-threshold method is applied to find the probability distribution of the very high stress ranges. The method of maximum-likelihood estimation is used to determine the parameters of the underlying generalized Pareto distribution. Further analysis shows that especially the number of the very high stress ranges, scattering for different time series, has a significant impact on the resulting fatigue damage.
KW - fatigue design
KW - generalized Pareto distribution
KW - jacket substructure
KW - offshore wind energy
KW - peak-over-threshold method
KW - probabilistic analysis
KW - tubular joints
UR - http://www.scopus.com/inward/record.url?scp=84969930891&partnerID=8YFLogxK
U2 - 10.1016/j.egypro.2015.11.417
DO - 10.1016/j.egypro.2015.11.417
M3 - Conference article
AN - SCOPUS:84969930891
VL - 80
SP - 151
EP - 158
JO - Energy Procedia
JF - Energy Procedia
SN - 1876-6102
T2 - 12th Deep Sea Offshore Wind R and D Conference, EERA DeepWind 2015
Y2 - 4 February 2015 through 6 February 2015
ER -