Superelement reduction of substructures for sequential load calculations in OpenFAST
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Keystone Engineering Inc., Metairie, LA (United States)
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.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Renewable Energy. Wind Energy Technologies Office
- Grant/Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1659881
- Report Number(s):
- NREL/JA-5000-75173; MainId:7075; UUID:ef644332-61ec-e911-9c29-ac162d87dfe5; MainAdminID:13559
- Journal Information:
- Journal of Physics. Conference Series, Vol. 1452; ISSN 1742-6588
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Flexible multibody dynamics using joint coordinates and the Rayleigh‐Ritz approximation: The general framework behind and beyond Flex
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journal | April 2019 |
Reduction of stiffness and mass matrices
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journal | February 1965 |
Accurate and efficient modeling of complex offshore wind turbine support structures using augmented superelements: Augmented superelement modeling of offshore support structures
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journal | April 2013 |
Coupling of substructures for dynamic analyses.
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journal | July 1968 |
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