Superelement Reduction of Substructures for Sequential Load Calculations in OpenFAST

Emmanuel Branlard; Matthew Shields; Benjamin Anderson; Rick Damiani; Jason Jonkman; Walter Musial; B. Foley; F. Wendt

doi:10.1088/1742-6596/1452/1/012033

Superelement Reduction of Substructures for Sequential Load Calculations in OpenFAST

Emmanuel Branlard, Matthew Shields, Benjamin Anderson, Rick Damiani, Jason Jonkman, Walter Musial, B. Foley, F. Wendt

National Wind Technology Center

Research output: Contribution to journal › Article › peer-review

6 Scopus Citations

Abstract

This article presents the superelement formulation newly implemented in OpenFAST to simulate fixed-bottom substructures with a reduced-order model similar to a common industry practice. The Guyan and Craig-Bampton methods are used to reduce the number of degrees of freedom and generate a so-called "superelement". The formulation allows manufacturers to exchange such superelements to perform load calculations without revealing sensitive information about the support structure (e.g., foundation, substructure, and/or tower) or turbine. The source code is made publicly available in the OpenFAST repository. Test cases with varying degrees of complexity are presented to validate the technique, and accuracy issues are discussed.

Original language	American English
Article number	Article No. 012033
Number of pages	14
Journal	Journal of Physics: Conference Series
Volume	1452
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/1452/1/012033 https://doi.org/10.1088/1742-6596/1452/1/012033
State	Published - 3 Mar 2020
Event	North American Wind Energy Academy, NAWEA 2019 and the International Conference on Future Technologies in Wind Energy 2019, WindTech 2019 - Amherst, United States Duration: 14 Oct 2019 → 16 Oct 2019

Bibliographical note

Publisher Copyright:
© 2020 IOP Publishing Ltd. All rights reserved.

NREL Publication Number

NREL/JA-5000-75173

Keywords

FEM
foundations
substructures
superelements

Access to Document

https://www.nrel.gov/docs/fy20osti/75173.pdf

Cite this

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title = "Superelement Reduction of Substructures for Sequential Load Calculations in OpenFAST",

abstract = "This article presents the superelement formulation newly implemented in OpenFAST to simulate fixed-bottom substructures with a reduced-order model similar to a common industry practice. The Guyan and Craig-Bampton methods are used to reduce the number of degrees of freedom and generate a so-called {"}superelement{"}. The formulation allows manufacturers to exchange such superelements to perform load calculations without revealing sensitive information about the support structure (e.g., foundation, substructure, and/or tower) or turbine. The source code is made publicly available in the OpenFAST repository. Test cases with varying degrees of complexity are presented to validate the technique, and accuracy issues are discussed.",

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AU - Shields, Matthew

AU - Anderson, Benjamin

AU - Damiani, Rick

AU - Jonkman, Jason

AU - Musial, Walter

AU - Foley, B.

AU - Wendt, F.

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AB - This article presents the superelement formulation newly implemented in OpenFAST to simulate fixed-bottom substructures with a reduced-order model similar to a common industry practice. The Guyan and Craig-Bampton methods are used to reduce the number of degrees of freedom and generate a so-called "superelement". The formulation allows manufacturers to exchange such superelements to perform load calculations without revealing sensitive information about the support structure (e.g., foundation, substructure, and/or tower) or turbine. The source code is made publicly available in the OpenFAST repository. Test cases with varying degrees of complexity are presented to validate the technique, and accuracy issues are discussed.

KW - FEM

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KW - substructures

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Superelement Reduction of Substructures for Sequential Load Calculations in OpenFAST

Abstract

Bibliographical note

NREL Publication Number

Keywords

Access to Document

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