OC6 Project Phase IV: Validation of Numerical Models for Novel Floating Offshore Wind Support Structures

Robertson, Amy; Bergua, Roger

doi:10.21947/2179225

Title: OC6 Project Phase IV: Validation of Numerical Models for Novel Floating Offshore Wind Support Structures

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Abstract

The fourth phase of the Offshore Code Comparison, Collaboration, Continued, with Correlation and unCertainty (OC6) aims to assess the ability of the tools to model a novel floating wind design. The design that was selected for this project is the TetraSpar designed by Stiesdal Offshore Technologies. The platform is a unique design that features a spar like stability with a very low center of gravity, but does not require deep-water ports. This combination is achieved with a system made of two separate steel structures, a hull at the water’s surface that supports the wind turbine tower, and a keel that is suspended below the main body. This lower keel has a very high density and drives the total platform’s low center of gravity. Scaled model tests of the TetraSpar design were performed in 2018-2019 by the University of Maine. The tests were performed with 1:43 Froude scaling. The data collected in the model tests provide a detailed description of the response of the platform in various controlled and relatively well understood conditions. Comparison with these data provides a good opportunity for validation of numerical models. The OC6 Phase IV work will focus on the specific parameters used in these scaledmore »« less

Authors:

Robertson, Amy; Bergua, Roger

National Renewable Energy Lab; Pacific Northwest National Laboratory
National Renewable Energy Lab

Publication Date:: Tue Oct 17 04:00:00 UTC 2023

Research Org.:: Atmosphere to Electrons (A2e) Data Archive and Portal, Pacific Northwest National Laboratory; PNNL

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)

Subject:: 17 WIND ENERGY

OSTI Identifier:: 2179225

DOI:: https://doi.org/10.21947/2179225

Citation Formats


                    Robertson, Amy, and Bergua, Roger. OC6 Project Phase IV: Validation of Numerical Models for Novel Floating Offshore Wind Support Structures.  United States: N. p., 2023. 
        Web.  doi:10.21947/2179225.

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                    Robertson, Amy, & Bergua, Roger. OC6 Project Phase IV: Validation of Numerical Models for Novel Floating Offshore Wind Support Structures.  United States.  doi:https://doi.org/10.21947/2179225

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                    Robertson, Amy, and Bergua, Roger. 2023.  
"OC6 Project Phase IV: Validation of Numerical Models for Novel Floating Offshore Wind Support Structures".  United States.  doi:https://doi.org/10.21947/2179225.  https://www.osti.gov/servlets/purl/2179225. Pub date:Tue Oct 17 04:00:00 UTC 2023

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@article{osti_2179225,

  title        = {OC6 Project Phase IV: Validation of Numerical Models for Novel Floating Offshore Wind Support Structures},

  author       = {Robertson, Amy and Bergua, Roger},

  abstractNote = {The fourth phase of the Offshore Code Comparison, Collaboration, Continued, with Correlation and unCertainty (OC6) aims to assess the ability of the tools to model a novel floating wind design. The design that was selected for this project is the TetraSpar designed by Stiesdal Offshore Technologies. The platform is a unique design that features a spar like stability with a very low center of gravity, but does not require deep-water ports. This combination is achieved with a system made of two separate steel structures, a hull at the water’s surface that supports the wind turbine tower, and a keel that is suspended below the main body. This lower keel has a very high density and drives the total platform’s low center of gravity. Scaled model tests of the TetraSpar design were performed in 2018-2019 by the University of Maine. The tests were performed with 1:43 Froude scaling. The data collected in the model tests provide a detailed description of the response of the platform in various controlled and relatively well understood conditions. Comparison with these data provides a good opportunity for validation of numerical models. The OC6 Phase IV work will focus on the specific parameters used in these scaled model tests. The load cases (LC) considered in this project are as follows: LC 1.X - Equilibrium and Static Offset Tests LC 2.X - Platform Free Decays LC 3.X - Turbine Thrust (Wind Only) LC 4.X - Regular and Irregular Waves (Wave only) LC 5.X - Combined Wind and Wave Loading},

  doi          = {10.21947/2179225},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Oct 17 04:00:00 UTC 2023},

  month        = {Tue Oct 17 04:00:00 UTC 2023}

}

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DOI: https://doi.org/10.21947/2179225

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