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Title: Superelement reduction of substructures for sequential load calculations in OpenFAST

Journal Article · · Journal of Physics. Conference Series

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

References (4)