RT Journal Article T1 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 A1 Bergua, Roger A1 Robertson, Amy A1 Jonkman, Jason A1 Platt, Andy A1 Page, Ana A1 Qvist, Jacob A1 Amet, Ervin A1 Cai, Zhisong A1 Han, Huali A1 Beardsell, Alec A1 Shi, Wei A1 Galván, Josean A1 Bachynski‐Polić, Erin A1 McKinnon, Gill A1 Harnois, Violette A1 Bonnet, Paul A1 Suja‐Thauvin, Loup A1 Hansen, Anders Melchior A1 Mendikoa Alonso, Iñigo A1 Aristondo, Ander A1 Battistella, Tommaso A1 Guanche, Raúl A1 Schünemann, Paul A1 Pham, Thanh‐Dam A1 Trubat, Pau A1 Alarcón, Daniel A1 Haudin, Florence A1 Nguyen, Minh Quan A1 Goveas, Akhilesh A1 Bachynski-Polić, Erin A1 Suja-Thauvin, Loup AB This 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. SN 1095-4244 YR 2022 FD 2022-05 LA eng NO Bergua , R , Robertson , A , Jonkman , J , Platt , A , Page , A , Qvist , J , Amet , E , Cai , Z , Han , H , Beardsell , A , Shi , W , Galván , J , Bachynski‐Polić , E , McKinnon , G , Harnois , V , Bonnet , P , Suja‐Thauvin , L , Hansen , A M , Mendikoa Alonso , I , Aristondo , A , Battistella , T , Guanche , R , Schünemann , P , Pham , TD , Trubat , P , Alarcón , D , Haudin , F , Nguyen , M Q , Goveas , A , Bachynski-Polić , E & Suja-Thauvin , L 2022 , ' 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 ' , Wind Energy , vol. 25 , no. 5 , pp. 793-810 . https://doi.org/10.1002/we.2698 NO Publisher Copyright: © 2021 Norwegian Geotechnical Institute (NGI). This article has been contributed to by US Government employees and their work is in the public domain in the USA. DS TECNALIA Publications RD 3 jul 2024