Browsing by Keyword "Monopile"
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Item Evaluation of Anticorrosion Coatings for Offshore Wind Turbine Monopiles for an Optimized and Time-Efficient Coating Application(2022-03-14) Marinova, Nevena; Urbegain, Aiala; Benguria, Pablo; Travé, Andreu; Caracena, Raúl; MATERIALES PARA CONDICIONES EXTREMASOffshore corrosion is a critical issue for metallic offshore structures. In this study, we investigated the corrosion protection of 12 coating systems for offshore monopiles in atmospheric, splash, and submerged zones, and we compared their performance under accelerated laboratory testing according to ISO 12944 with real field exposure. The results showed that the aging of the coatings did not accelerate at the same rate in all coatings. Furthermore, we observed that for some types of laboratory tests, the results are not representative of real field exposure as the laboratory test is much less aggressive than the real offshore conditions. This observation confirms that the field exposure data provide valuable information in order to properly assess the corrosion protection of coatings and thus the expected lifetime of the offshore structure. Additionally, we analyzed the rate-determining steps involved in the application of the coating onto the entire monopile and quantified the possibility of achieving a more time efficient coating process. Our results contribute to a better understanding of the issues related to testing and qualification of corrosion protection coatings for offshore structures and provide useful insights for the selection of coating solutions at the industrial level.Item OC6 Phase II: Integration and verification of a new soil–structure interaction model for offshore wind design: Integration and verification of a new soil–structure interaction model for offshore wind design(2022-05) Bergua, Roger; Robertson, Amy; Jonkman, Jason; Platt, Andy; Page, Ana; Qvist, Jacob; Amet, Ervin; Cai, Zhisong; Han, Huali; Beardsell, Alec; Shi, Wei; Galván, Josean; Bachynski‐Polić, Erin; McKinnon, Gill; Harnois, Violette; Bonnet, Paul; Suja‐Thauvin, Loup; Hansen, Anders Melchior; Mendikoa Alonso, Iñigo; Aristondo, Ander; Battistella, Tommaso; Guanche, Raúl; Schünemann, Paul; Pham, Thanh‐Dam; Trubat, Pau; Alarcón, Daniel; Haudin, Florence; Nguyen, Minh Quan; Goveas, Akhilesh; Bachynski-Polić, Erin; Suja-Thauvin, Loup; Tecnalia Research & Innovation; RENOVABLES OFFSHOREThis paper provides a summary of the work done within the OC6 Phase II project, which was focused on the implementation and verification of an advanced soil–structure interaction model for offshore wind system design and analysis. The soil–structure interaction model comes from the REDWIN project and uses an elastoplastic, macroelement model with kinematic hardening, which captures the stiffness and damping characteristics of offshore wind foundations more accurately than more traditional and simplified soil–structure interaction modeling approaches. Participants in the OC6 project integrated this macroelement capability to coupled aero-hydro-servo-elastic offshore wind turbine modeling tools and verified the implementation by comparing simulation results across the modeling tools for an example monopile design. The simulation results were also compared to more traditional soil–structure interaction modeling approaches like apparent fixity, coupled springs, and distributed springs models. The macroelement approach resulted in smaller overall loading in the system due to both shifts in the system frequencies and increased energy dissipation. No validation work was performed, but the macroelement approach has shown increased accuracy within the REDWIN project, resulting in decreased uncertainty in the design. For the monopile design investigated here, that implies a less conservative and thus more cost-effective offshore wind design.