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:
- Issue Date:
- Research Org.:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1117646
- Patent Number(s):
- 8621934
- Application Number:
- 12/747,458
- Assignee:
- Alliance for Sustainable Energy, LLC (Golden, CO)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F03 - MACHINES OR ENGINES FOR LIQUIDS F03D - WIND MOTORS
F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05B - INDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS, TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY
- 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 = {Tue Jan 07 00:00:00 EST 2014},
month = {Tue Jan 07 00:00:00 EST 2014}
}
Works referenced in this record:
Force or pressure feedback control for seismic vibrators
patent, May 1985
- Bedenbender, John W.
- US Patent Document 4,519,053
Method and apparatus for determining resonant frequency of a turbine blade made of a meterial not responsive to a magnetic field
patent, May 1990
- Moore, Donald W.
- US Patent Document 4,924,706
Material testing system providing simultaneous force loads
patent, June 1995
- Gram, Martin M.; Larsen, Carl G.; Chen, Han
- US Patent Document 5,425,276
High-cycle fatigue test machine
patent, February 2000
- Owen, Thomas E.; Davidson, David L.; Nagy, Andrew G.
- US Patent Document 6,023,980
Apparatus and method for applying a cyclical load to an elongate specimen
patent, August 2013
- Waggot, Alan; Hope, Peter; Williamson, Ian
- US Patent Document 8,505,387
Resonance test system
patent-application, February 2006
- Musial, Walter; White, Daris
- US Patent Application 10/520011; 20060037402
Works referencing / citing this record:
Test method, test rigs and control system
patent, May 2016
- Klaas, Andrej; Hinrichs, Rolf; Kotzke, Andreas
- US Patent Document 9,354,149