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Title: Dual-axis resonance testing of wind turbine blades

Abstract

An apparatus (100) for fatigue testing test articles (104) including wind turbine blades. The apparatus (100) includes a test stand (110) that rigidly supports an end (106) of the test article (104). An actuator assembly (120) is attached to the test article (104) and is adapted for substantially concurrently imparting first and second forcing functions in first and second directions on the test article (104), with the first and second directions being perpendicular to a longitudinal axis. A controller (130) transmits first and second sets of displacement signals (160, 164) to the actuator assembly (120) at two resonant frequencies of the test system (104). The displacement signals (160, 164) initiate the actuator assembly (120) to impart the forcing loads to concurrently oscillate the test article (104) in the first and second directions. With turbine blades, the blades (104) are resonant tested concurrently for fatigue in the flapwise and edgewise directions.

Inventors:
; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1117646
Patent Number(s):
8,621,934
Application Number:
12/747,458
Assignee:
Alliance for Sustainable Energy, LLC (Golden, CO) NREL
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Patent
Resource Relation:
Patent File Date: 2008 Dec 09
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Hughes, Scott, Musial, Walter, and White, Darris. Dual-axis resonance testing of wind turbine blades. United States: N. p., 2014. Web.
Hughes, Scott, Musial, Walter, & White, Darris. Dual-axis resonance testing of wind turbine blades. United States.
Hughes, Scott, Musial, Walter, and White, Darris. Tue . "Dual-axis resonance testing of wind turbine blades". United States. https://www.osti.gov/servlets/purl/1117646.
@article{osti_1117646,
title = {Dual-axis resonance testing of wind turbine blades},
author = {Hughes, Scott and Musial, Walter and White, Darris},
abstractNote = {An apparatus (100) for fatigue testing test articles (104) including wind turbine blades. The apparatus (100) includes a test stand (110) that rigidly supports an end (106) of the test article (104). An actuator assembly (120) is attached to the test article (104) and is adapted for substantially concurrently imparting first and second forcing functions in first and second directions on the test article (104), with the first and second directions being perpendicular to a longitudinal axis. A controller (130) transmits first and second sets of displacement signals (160, 164) to the actuator assembly (120) at two resonant frequencies of the test system (104). The displacement signals (160, 164) initiate the actuator assembly (120) to impart the forcing loads to concurrently oscillate the test article (104) in the first and second directions. With turbine blades, the blades (104) are resonant tested concurrently for fatigue in the flapwise and edgewise directions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2014},
month = {1}
}

Patent:

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