Investigation of Methods for Reducing Blade and System Loads for Two-Bladed Teetering-Hub Horizontal-Axis Wind Turbines

Alan D. Wright, Gunjit S. Bir, Charles P. Butterfield

Research output: Contribution to conferencePaperpeer-review

1 Scopus Citations

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 interactions between the rotor and tower for a two-bladed teetering hub wind turbine are examined. Several turbine design parameters including tip-brake mass, blade structural pre-twist, 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 particuliar two-bladed teetering hub turbine under study. We 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.

Original languageAmerican English
Pages253
Number of pages1
StatePublished - 1995
EventProceedings of the Energy-Sources Technology Conference and Exhibition - Houston, TX, USA
Duration: 29 Jan 19951 Feb 1995

Conference

ConferenceProceedings of the Energy-Sources Technology Conference and Exhibition
CityHouston, TX, USA
Period29/01/951/02/95

NREL Publication Number

  • ACNR/CP-16571

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