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Title: Base excitation testing system using spring elements to pivotally mount wind turbine blades

Abstract

A system (1100) for fatigue testing wind turbine blades (1102) through forced or resonant excitation of the base (1104) of a blade (1102). The system (1100) includes a test stand (1112) and a restoring spring assembly (1120) mounted on the test stand (1112). The restoring spring assembly (1120) includes a primary spring element (1124) that extends outward from the test stand (1112) to a blade mounting plate (1130) configured to receive a base (1104) of blade (1102). During fatigue testing, a supported base (1104) of a blad (1102) may be pivotally mounted to the test stand (1112) via the restoring spring assembly (1120). The system (1100) may include an excitation input assembly (1140) that is interconnected with the blade mouting plate (1130) to selectively apply flapwise, edgewise, and/or pitch excitation forces. The restoring spring assemply (1120) may include at least one tuning spring member (1127) positioned adjacent to the primary spring element (1124) used to tune the spring constant or stiffness of the primary spring element (1124) in one of the excitation directions.

Inventors:
; ; ;
Issue Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1109490
Patent Number(s):
8,601,878
Application Number:
12/990,069
Assignee:
Alliance for Sustainable Energy, LLC (Golden, CO)
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY

Citation Formats

Cotrell, Jason, Hughes, Scott, Butterfield, Sandy, and Lambert, Scott. Base excitation testing system using spring elements to pivotally mount wind turbine blades. United States: N. p., 2013. Web.
Cotrell, Jason, Hughes, Scott, Butterfield, Sandy, & Lambert, Scott. Base excitation testing system using spring elements to pivotally mount wind turbine blades. United States.
Cotrell, Jason, Hughes, Scott, Butterfield, Sandy, and Lambert, Scott. Tue . "Base excitation testing system using spring elements to pivotally mount wind turbine blades". United States. https://www.osti.gov/servlets/purl/1109490.
@article{osti_1109490,
title = {Base excitation testing system using spring elements to pivotally mount wind turbine blades},
author = {Cotrell, Jason and Hughes, Scott and Butterfield, Sandy and Lambert, Scott},
abstractNote = {A system (1100) for fatigue testing wind turbine blades (1102) through forced or resonant excitation of the base (1104) of a blade (1102). The system (1100) includes a test stand (1112) and a restoring spring assembly (1120) mounted on the test stand (1112). The restoring spring assembly (1120) includes a primary spring element (1124) that extends outward from the test stand (1112) to a blade mounting plate (1130) configured to receive a base (1104) of blade (1102). During fatigue testing, a supported base (1104) of a blad (1102) may be pivotally mounted to the test stand (1112) via the restoring spring assembly (1120). The system (1100) may include an excitation input assembly (1140) that is interconnected with the blade mouting plate (1130) to selectively apply flapwise, edgewise, and/or pitch excitation forces. The restoring spring assemply (1120) may include at least one tuning spring member (1127) positioned adjacent to the primary spring element (1124) used to tune the spring constant or stiffness of the primary spring element (1124) in one of the excitation directions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {12}
}

Patent:

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