Surrogate infill criteria for operational fatigue reliability analysis
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Conference PaperDate:
2018Access:
openAccessCitation:
Teixeira, R., O'Connor, A. & Nogal, M., Surrogate infill criteria for operational fatigue reliability analysis, Life Cycle Analysis and Assessment in Civil Engineering: Towards an Integrated Vision: Proceedings of the Sixth International Symposium on Life-Cycle Civil Engineering, Sixth International Symposium on Life-Cycle Civil Engineering, Ghent, Belgium, 2018, 2018Abstract:
Analysis of Offshore Wind Turbine (OWT) fatigue damage is an intense, resource demanding
task. While the current methodologies to design OWT to fatigue are quite limited in the way and amount of
uncertainty they can account for, they still represent a relevant share of the total effort needed in the OWT
design process. The robustness achieved in the design process is usually limited. To enable OWT to be more
robust, an innovative methodology that tackles current limitations using a balanced amount of designing effort
was developed. It consists of generating a short-term fatigue damage (DSH) using a Kriging surrogate model
that accurately accounts for uncertainty using an adaptive approach.
The current paper discusses the application of a reinterpolation convergence to build a Kriging surrogate model
that replicates DSH in OWT tower components. Different variables involved in the convergence are discussed.
The discussion extends then to how the design could be improved by using different convergence scenarios for
the Kriging surface. Cross-validation is used to train and validate the surrogate surface. The main goal is to
give the designer a rationale on the trade-off between computational time and accuracy using the mentioned
approach to design robust OWT towers.
Results show that on a design basis two levels of approach may be efficient. In the first, if a very high computational
cost is expected, a trade-off between accuracy and computational time must be considered and then, if
the intention is to check how robust the current design is, a full convergence of the surface should be pursued.
Sponsor
Grant Number
European Commission
642453
Author's Homepage:
http://people.tcd.ie/teixeirrhttp://people.tcd.ie/nogalm
http://people.tcd.ie/oconnoaj
Sponsor:
European CommissionOther Titles:
Life Cycle Analysis and Assessment in Civil Engineering: Towards an Integrated Vision: Proceedings of the Sixth International Symposium on Life-Cycle Civil EngineeringSixth International Symposium on Life-Cycle Civil Engineering
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Conference PaperAvailability:
Full text availableKeywords:
Offshore wind turbine, Operational fatigue, Kriging models, Fatigue design, Structural reliabilitySubject (TCD):
Probability theory , Reliability (Engineering) , SURROGATE , Wind Energy and Wind TurbinesMetadata
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