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Title: New Structural-Dynamics Module for Offshore Multimember Substructures within the Wind Turbine Computer-Aided Engineering Tool FAST: Preprint

FAST, developed by the National Renewable Energy Laboratory (NREL), is a computer-aided engineering (CAE) tool for aero-hydro-servo-elastic analysis of land-based and offshore wind turbines. This paper discusses recent upgrades made to FAST to enable loads simulations of offshore wind turbines with fixed-bottom, multimember support structures (e.g., jackets and tripods, which are commonly used in transitional-depth waters). The main theory and strategies for the implementation of the multimember substructure dynamics module (SubDyn) within the new FAST modularization framework are introduced. SubDyn relies on two main engineering schematizations: 1) a linear frame finite-element beam (LFEB) model and 2) a dynamics system reduction via Craig-Bampton's method. A jacket support structure and an offshore system consisting of a turbine atop a jacket substructure were simulated to test the SubDyn module and to preliminarily assess results against results from a commercial finite-element code.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
1090159
Report Number(s):
NREL/CP-5000-58093
DOE Contract Number:
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at the 23rd International Ocean, Offshore and Polar Engineering Conference ? ISOPE 2013, 30 June - 5 July 2013, Anchorage, Alaska
Research Org:
National Renewable Energy Laboratory (NREL), Golden, CO.
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy Wind Power Program
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY OFFSHORE; WIND TURBINE; MULTIMEMBER; SUPPORT STRUCTURE; BEAM FINITE ELEMENT; DYNAMIC REDUCTION; STATE-SPACE; NREL; Wind Energy