Crack detection on wind turbine blades in an operating environment using vibro-acoustic modulation technique

2013 ◽  
Author(s):  
S. Kim ◽  
D. E. Adams ◽  
H. Sohn
Keyword(s):  
Wind Turbine ◽  
Crack Detection ◽  
Turbine Blades ◽  
Operating Environment ◽  
Wind Turbine Blades ◽  
Modulation Technique ◽  
Acoustic Modulation

Crack detection technique for operating wind turbine blades using Vibro-Acoustic Modulation

2014 ◽  
Vol 13 (6) ◽  
pp. 660-670 ◽  
Author(s):  
Sungmin Kim ◽  
Douglas E Adams ◽  
Hoon Sohn ◽  
Gustavo Rodriguez-Rivera ◽  
Noah Myrent ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Crack Detection ◽  
Turbine Blades ◽  
Low Frequency ◽  
Detection Technique ◽  
New Technique ◽  
Wind Turbine Blades ◽  
Excitation Signal ◽  
Acoustic Modulation

This article presents a new technique for identifying cracks in wind turbine blades undergoing operational loads using the Vibro-Acoustic Modulation technique. Vibro-Acoustic Modulation utilizes a low-frequency pumping excitation signal in conjunction with a high-frequency probing excitation signal to create the modulation that is used to identify cracks. Wind turbines provide the ideal conditions in which Vibro-Acoustic Modulation can be utilized because wind turbines experience large low-frequency structural vibrations during operation which can serve as the low-frequency pumping excitation signal. In this article, the theory for the vibro-acoustic technique is described, and the proposed crack detection technique is demonstrated with Vibro-Acoustic Modulation experiments performed on a small Whisper 100 wind turbine in operation. The experimental results are also compared with two other conventional vibro-acoustic techniques in order to validate the new technique. Finally, a computational study is demonstrated for choosing a proper probing signal with a finite element model of the cracked blade to maximize the sensitivity of the technique for detecting cracks.

Crack Detection of Wind Turbine Blades using Vibro-Acoustic modulation

2020 ◽  
Vol 29 (6) ◽  
Author(s):  
Bo Qin ◽  
Xiaofeng Geng ◽  
Yongjian Li ◽  
Kexiang Wei
Keyword(s):  
Wind Turbine ◽  
Crack Detection ◽  
Turbine Blades ◽  
Wind Turbine Blades ◽  
Acoustic Modulation

Modal Analysis for Crack Detection in Small Wind Turbine Blades

2013 ◽  
Vol 569-570 ◽  
pp. 603-610 ◽  
Author(s):  
Martin Dalgaard Ulriksen ◽  
Jonas Falk Skov ◽  
Kristoffer Ahrens Dickow ◽  
Poul Henning Kirkegaard ◽  
Lars Damkilde
Keyword(s):  
Wind Turbine ◽  
Modal Analysis ◽  
Health Monitoring ◽  
Crack Detection ◽  
Turbine Blades ◽  
Experimental Tests ◽  
Modal Parameters ◽  
Fe Model ◽  
Wind Turbine Blades ◽  
Small Wind Turbine

The aim of the present paper is to evaluate structural health monitoring (SHM) techniques based on modal analysis for crack detection in small wind turbine blades. A finite element (FE) model calibrated to measured modal parameters will be introduced to cracks with different sizes along one edge of the blade. Changes in modal parameters from the FE model are compared with data obtained from experimental tests. These comparisons will be used to validate the FE model and subsequently discuss the usability of SHM techniques based on modal parameters for condition monitoring of wind turbine blades.

Experiments of Wind Turbine Blades with Rocket Triggered Lightning

2009 ◽  
Vol 129 (5) ◽  
pp. 689-695
Author(s):  
Masayuki Minowa ◽  
Shinichi Sumi ◽  
Masayasu Minami ◽  
Kenji Horii
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Wind Turbine Blades ◽  
Triggered Lightning

Folding of flexible hinges for aircraft wingtips and wind turbine blades

2021 ◽  
Author(s):  
Aileen G. Bowen Perez ◽  
Giovanni Zucco ◽  
Paul Weaver
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Wind Turbine Blades

Evaluation of the influence of wind speed and angle of attack on the aerodynamic effect of wind turbine blades

2017 ◽  
Author(s):  
Salete Alves ◽  
Luiz Guilherme Vieira Meira de Souza ◽  
Edália Azevedo de Faria ◽  
Maria Thereza dos Santos Silva ◽  
Ranaildo Silva
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Turbine Blades ◽  
Angle Of Attack ◽  
Wind Turbine Blades ◽  
Aerodynamic Effect
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