Bi-axial neutral axis tracking for damage detection in wind-turbine towers

The seismic response of tubular steel wind turbine towers is of significant concern as they are increasingly being installed in seismic areas and design codes do not clearly address this aspect of design. The seismic hazard is hence assessed for the Canadian seismic environment using implicit finite element analysis and incremental dynamic analysis of a 1.65 MW wind turbine tower. Its behaviour under seismic excitation is evaluated, damage states are defined, and a framework is developed for determining the probability of damage of the tower at varying seismic hazard levels. Results of the implementation of this framework in two Canadian locations are presented herein, where the risk was found to be low for the seismic hazard level prescribed for buildings. However, the design of wind turbine towers is subject to change, and the design spectrum is highly uncertain. Thus, a methodology is outlined to thoroughly investigate the probability of reaching predetermined damage states under any seismic loading conditions for future considerations.

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Remote monitoring and nondestructive evaluation of wind turbine towers

10.1117/12.2044942 ◽

2014 ◽

Cited By ~ 2

Author(s):

Chih-Hung Chiang ◽

Chih-Peng Yu ◽

Keng-Tsang Hsu ◽

Chia-Chi Cheng ◽

Ying-Tzu Ke ◽

...

Keyword(s):

Nondestructive Evaluation ◽

Wind Turbine ◽

Remote Monitoring ◽

Wind Turbine Towers

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Radar-based structural health monitoring of wind turbine blades: The case of damage detection

Structural Health Monitoring ◽

10.1177/1475921717721447 ◽

2017 ◽

Vol 17 (4) ◽

pp. 815-822 ◽

Cited By ~ 26

Author(s):

Jochen Moll ◽

Philip Arnold ◽

Moritz Mälzer ◽

Viktor Krozer ◽

Dimitry Pozdniakov ◽

...

Keyword(s):

Structural Health Monitoring ◽

Damage Detection ◽

Wind Turbine ◽

Health Monitoring ◽

Turbine Blades ◽

Heterogeneous Material ◽

Material System ◽

Wind Turbine Blades ◽

Millimetre Wave ◽

Structural Health

Structural health monitoring of wind turbine blades is challenging due to its large dimensions, as well as the complex and heterogeneous material system. In this article, we will introduce a radically new structural health monitoring approach that uses permanently installed radar sensors in the microwave and millimetre-wave frequency range for remote and in-service inspection of wind turbine blades. The radar sensor is placed at the tower of the wind turbine and irradiates the electromagnetic waves in the direction of the rotating blades. Experimental results for damage detection of complex structures will be presented in a laboratory environment for the case of a 10-mm-thick glass-fibre-reinforced plastic plate, as well as a real blade-tip sample.

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Development of Lightweight Designs for the Production of Wind Turbine Towers

Enabling Manufacturing Competitiveness and Economic Sustainability ◽

10.1007/978-3-319-02054-9_75 ◽

2014 ◽

pp. 443-448 ◽

Cited By ~ 1

Author(s):

Mona Goudarzi ◽

Malte Stonis ◽

Bernd-Arno Behrens

Keyword(s):

Wind Turbine ◽

Wind Turbine Towers

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Earth-termination system for onshore wind Turbines.

Transaction Kola Science Cetnre ◽

10.37614/2307-5252.2020.7.19.008 ◽

2020 ◽

Vol 11 (7-2020) ◽

pp. 66-72

Author(s):

Liubov A. Belova ◽

Keyword(s):

Wind Turbine ◽

Wind Turbines ◽

Lightning Strike ◽

Lightning Protection ◽

Protection Measures ◽

Lightning Strikes ◽

Grounding System ◽

Initial Stage ◽

Wind Turbine Towers ◽

Surge Protection

The earth-termination system for towers of ground-based wind turbines in addition to protective and functional grounding provides lightning protection grounding, which is especially important since the wind turbine is susceptible to lightning strikes. If insufficient protective measures are taken, the risk of damage to a wind turbine due to a lightning strike increases. Therefore, a well-thought-out built-in grounding system for wind turbine towers is needed, which would function as necessary and guarantee long-term mechanical strength and corrosion resistance. The configuration of grounding systems for wind turbines is discussed in IEC 61400-24, which deals with the topic of lightning protection for wind turbines, including detailed information on the choice of lightning protection measures and surge protection. It is advisable to create a lightning protection concept at the initial stage of planning a wind turbine in order to avoid later costly repairs and retrofitting.

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