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RESEARCH PAPERS

The Determination of Stochastic Loads on Horizontal Axis Wind Turbine Blades

[+] Author and Article Information
L. N. Freeman, R. E. Wilson

Department of Mechanical Engineering, Oregon State University, Corvallis, OR 97331

J. Sol. Energy Eng 120(2), 115-120 (May 01, 1998) (6 pages) doi:10.1115/1.2888053 History: Revised March 01, 1996; Received January 01, 1998; Online February 14, 2008

Abstract

The FAST Code which is capable of determining structural loads of a flexible, teetering, horizontal axis wind turbine is described and comparisons of calculated loads with test data are given at two wind speeds for the ESI-80. The FAST Code models a two-bladed HAWT with degrees-of-freedom for blade bending, teeter, drive train flexibility, yaw, and windwise and crosswind tower motion. The code allows blade dimensions, stiffnesses, and weights to differ and the code models tower shadow, wind shear, and turbulence. Additionally, dynamic stall is included as are delta-3 and an underslung rotor. Load comparisons are made with ESI-80 test data in the form of power spectral density, rainflow counting, occurrence histograms, and azimuth averaged bin plots. It is concluded that agreement between the FAST Code and test results is good.

Copyright © 1998 by The American Society of Mechanical Engineers
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