Operational modal analysis and wavelet transformation for damage identification in wind turbine blades

The modal analysis is an approximate method to study the dynamic characteristics of the structure, the modal is the natural vibration characteristics of the structure, each modal has a specific natural frequency, damping ratios and mode shapes. This thesis will take 1.2MW horizontal axis wind turbine blade for example, and use parametric language APDL of ANSYS for directly modeling, then set the basic parameters of the material, mesh and discuss modal analysis, lastly conduct a detailed analysis of the results.

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On Structural Health Monitoring of Wind Turbine Blades

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.569-570.628 ◽

2013 ◽

Vol 569-570 ◽

pp. 628-635 ◽

Cited By ~ 6

Author(s):

Jonas Falk Skov ◽

Martin Dalgaard Ulriksen ◽

Kristoffer Ahrens Dickow ◽

Poul Henning Kirkegaard ◽

Lars Damkilde

Keyword(s):

Structural Health Monitoring ◽

Wind Turbine ◽

Health Monitoring ◽

Damage Identification ◽

State Of The Art ◽

Turbine Blades ◽

Wind Turbine Blades ◽

Noise And Vibration ◽

Structural Health ◽

Temperature Noise

The aim of the present paper is to provide a state-of-the-art outline of structural health monitoring (SHM) techniques, utilizing temperature, noise and vibration, for wind turbine blades, and subsequently perform a typology on the basis of the typical 4 damage identification levels in SHM. Before presenting the state-of-the-art outline, descriptions of structural damages typically occurring in wind turbine blades are provided along with a brief description of the 4 damage identification levels.

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Structural Damage Identification in Wind Turbine Blades Using Piezoelectric Active Sensing

Structural Dynamics and Renewable Energy, Volume 1 - Conference Proceedings of the Society for Experimental Mechanics Series ◽

10.1007/978-1-4419-9716-6_6 ◽

2011 ◽

pp. 55-65 ◽

Cited By ~ 6

Author(s):

Abraham Light-Marquez ◽

Alexandra Sobin ◽

Gyuhae Park ◽

Kevin Farinholt

Keyword(s):

Wind Turbine ◽

Structural Damage ◽

Damage Identification ◽

Turbine Blades ◽

Active Sensing ◽

Wind Turbine Blades ◽

Structural Damage Identification

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Modal Analysis of Wind Turbine Blades with Different Test Setup Configurations

Topics in Modal Analysis & Testing, Volume 8 - Conference Proceedings of the Society for Experimental Mechanics Series ◽

10.1007/978-3-030-12684-1_14 ◽

2019 ◽

pp. 143-152 ◽

Cited By ~ 1

Author(s):

E. Di Lorenzo ◽

S. Manzato ◽

B. Peeters ◽

V. Ruffini ◽

P. Berring ◽

...

Keyword(s):

Wind Turbine ◽

Modal Analysis ◽

Turbine Blades ◽

Wind Turbine Blades ◽

Test Setup

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Aerodynamic Design and Modal Analysis on Wind Turbine Blade Based on CAD/CAE

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.952.181 ◽

2014 ◽

Vol 952 ◽

pp. 181-185

Author(s):

Qian Qian Zhou ◽

He Sun ◽

Chun Bao Liu ◽

Yang Wang ◽

Xiao Guang Liu

Keyword(s):

Wind Turbine ◽

Modal Analysis ◽

Turbine Blade ◽

Turbine Blades ◽

Excitation Frequency ◽

Optimization Method ◽

Wind Turbine Blade ◽

Wind Turbine Blades ◽

Gradient Distribution ◽

Design And Optimization

Wind turbine blade is an important component to capture wind energy and converse energy. Basing on Wilson optimization method and engineering pratice, 2MW wind turbine blade’s aerodynamic profile is designed. Meanwhile, in order to avoid the resonance damage, top 10 rank modal frequencies and displacement gradient distribution contours are obtained through modal analysis. The results show that blade’s natural frequency does not coincide with the external excitation frequency, which avoids the resonance damage. Blade’s major vibration forms are waving and shimmy, requiring the ability of excellent resisting torsion. Therefore, the design should enhance bending stiffness of the blade. This paper provides an effective method for large wind turbine blades’ design and optimization.

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