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Title: An investigation of methods for reducing blade and system loads for two-bladed teetering-hub horizontal-axis wind turbines

Abstract

Designing low cost wind turbines having long fatigue lifetimes and low cyclic component and system loads is a major goal of the Federal Wind Energy Program and the wind industry. To achieve this goal, predictions derived from analytical models of complex and dynamically coupled systems are necessary. These models are necessary in order to capture the complex kinematic and dynamic couplings exhibited by the HAWT (Horizontal Axis Wind Turbine). In this paper interaction between the rotor and tower for a two-bladed teetering hub wind turbine are examined. Several turbine design parameters including a tip-brake mass, blade structural pretwist, tower shadow intensity, and system natural frequencies directly affect the predicted blade and system loads. Figure 1 for example shows the effects blade-tip-brake mass might have on predicted blade-root edgewise-bending moments for a particular two-bladed teetering hub turbine under study. The authors use the ADAMS (Automatic Dynamic Analysis of Mechanical Systems) software and the Oregon State University FAST (Fatigue, Aerodynamics, Structures, and Turbulence) codes to show these parameters on predicted rotor and system loads.

Authors:
; ;  [1]
  1. National Renewable Energy Laboratory, Golden, CO (United States). Wind Technology Division
Publication Date:
OSTI Identifier:
93015
Report Number(s):
CONF-950116-
ISBN 0-7918-1294-4; TRN: IM9537%%58
Resource Type:
Conference
Resource Relation:
Conference: 1995 American Society of Mechanical Engineers (ASME) energy sources technology conference and exhibition, Houston, TX (United States), 29 Jan - 1 Feb 1995; Other Information: PBD: 1995; Related Information: Is Part Of Wind energy 1995. SED-Volume 16; Musial, W.D.; Hock, S.M. [eds.] [National Renewable Energy Lab, Golden, CO (United States)]; Berg, D.E. [ed.] [Sandia National Labs., Albuquerque, NM (United States)]; PB: 298 p.
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; WIND TURBINES; SERVICE LIFE; FATIGUE; MECHANICAL STRUCTURES; A CODES; F CODES

Citation Formats

Wright, A D, Bir, G S, and Butterfield, C P. An investigation of methods for reducing blade and system loads for two-bladed teetering-hub horizontal-axis wind turbines. United States: N. p., 1995. Web.
Wright, A D, Bir, G S, & Butterfield, C P. An investigation of methods for reducing blade and system loads for two-bladed teetering-hub horizontal-axis wind turbines. United States.
Wright, A D, Bir, G S, and Butterfield, C P. 1995. "An investigation of methods for reducing blade and system loads for two-bladed teetering-hub horizontal-axis wind turbines". United States.
@article{osti_93015,
title = {An investigation of methods for reducing blade and system loads for two-bladed teetering-hub horizontal-axis wind turbines},
author = {Wright, A D and Bir, G S and Butterfield, C P},
abstractNote = {Designing low cost wind turbines having long fatigue lifetimes and low cyclic component and system loads is a major goal of the Federal Wind Energy Program and the wind industry. To achieve this goal, predictions derived from analytical models of complex and dynamically coupled systems are necessary. These models are necessary in order to capture the complex kinematic and dynamic couplings exhibited by the HAWT (Horizontal Axis Wind Turbine). In this paper interaction between the rotor and tower for a two-bladed teetering hub wind turbine are examined. Several turbine design parameters including a tip-brake mass, blade structural pretwist, tower shadow intensity, and system natural frequencies directly affect the predicted blade and system loads. Figure 1 for example shows the effects blade-tip-brake mass might have on predicted blade-root edgewise-bending moments for a particular two-bladed teetering hub turbine under study. The authors use the ADAMS (Automatic Dynamic Analysis of Mechanical Systems) software and the Oregon State University FAST (Fatigue, Aerodynamics, Structures, and Turbulence) codes to show these parameters on predicted rotor and system loads.},
doi = {},
url = {https://www.osti.gov/biblio/93015}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Sep 01 00:00:00 EDT 1995},
month = {Fri Sep 01 00:00:00 EDT 1995}
}

Conference:
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