Session: 09-02-03 Wind Energy: Moorings I

Submission Number: 156781

Floating Wind Turbine Dynamic Response Considering Chain-Seabed Interaction in SIMA 

Traditional fully integrated analyses of floating wind turbines (FWTs) often assume that mooring points are fixed on the seabed, overlooking the complex interactions between the mooring lines and the seabed itself. This simplification fails to account for factors like seabed deformation and friction. As a result, it introduces potential inconsistencies and uncertainties into mooring system design, potentially leading to less accurate predictions of performance and safety under varying ocean conditions. This study presents a macro-model integrated into SIMA to simulate the interaction between mooring lines and seabed soil, capturing the coupled non-linear relationship between displacement and soil reaction forces in 3D. It evaluates seabed friction and chain embedment effects during the pretension process. The model was applied to static mooring analyses of the VolturnUS-S floater with the IEA 15MW floating wind turbine. The study highlights the critical role of modeling the embedded mooring line in accurately capturing seabed friction mobilization. When the embedded portion of the mooring line is not considered, the model predicts higher tension in the mooring lines due to reduced displacement near the padeye on the seabed. This finding underscores the importance of accounting for the embedded line to achieve a more realistic representation of frictional forces between the mooring line and the seabed.

Presenting Author: Shengjie Rui Norwegian Geotechnical Institute

Presenting Author Biography: Shengjie Rui, a Marie Curie Research Fellow with full marks (Top 0.33%), is currently working at the Norwegian Geotechnical Institute (NGI) in Norway, focusing on research related to offshore geotechnics and ocean engineering. I hold a Ph.D. in geotechnical engineering from Zhejiang University, supervised by Prof. Lizhong Wang and Prof. Zhen Guo.
I lead 1 European Union fundings, participate in 5 international level projects (European Union, Norway), have published over 46 papers (including 35 SCI papers, 1 article is selected as highly cited and hot topic paper), hold 15 national invention patents (including 5 US invention patents), and get 761 citations by Google.
I serve as a Nominated/Corresponding Member of several Technical Committees within the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE), including TC104 Physical Modelling, TC209 Offshore Geotechnics, TC213 Scour and Erosion, and TC309 Machine Learning. Additionally, I am a member of the International Association for Geological Disaster Reduction (ICGdR) TC-4. I also hold roles as Session Chair for the GeoShanghai International Conference 2024 and the ASME 2024 43rd International Conference on Ocean, Offshore, and Arctic Engineering.
I serve as Associate Editor for the SCI journal KSCE Journal of Civil Engineering and as a member of the Editorial Board for Frontiers in Marine Science. Additionally, I have been invited as a Guest Editor for Frontiers in Marine Science, Sustainability, and Journal of Marine Science and Engineering. I also review papers for over 30 SCI journals, including Géotechnique, Marine Structures, Ocean Engineering, and Acta Geotechnica.
I have built a strong network with professors from leading universities worldwide and have been invited to present at several prestigious institutions, including the Massachusetts Institute of Technology (MIT), University of Oxford, Imperial College London, University of California (Berkeley and Davis), Nanyang Technological University (NTU), University of Southampton, Norwegian University of Science and Technology (NTNU), and the University of Dundee.
I have received over 25 honors and awards, including Bright Spark Lecturer awarded by International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE), LIU Huixian Earthquake Engineering Scholarship Award (Only 12 in the world), the Excellent PhD Thesis Award from the Chinese Society for Rock Mechanics & Engineering (CSRME) (Only ten in China), Excellent PhD Thesis Award of Zhejiang University (TOP3%), the China National Scholarship, and First Prize of Engineering Construction Science and Technology Progress of China (Industry Association Award).