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A method to estimate bending moments acting on a wind turbine blade specimen using FBG sensors

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Abstract

A new method to estimate bending moments of a blade specimen having a constant cross section throughout was developed using fiber Bragg grating sensors. Based on theories of solid mechanics, strains of the simplified model of the specimen were evaluated for various pitching angles and the forces exerted. It was found by both theory and experiment that at least two FBG sensors are necessary to find out the magnitude and direction of the load acting on the specimen from measured longitudinal strain information. A method was also found to estimate the flatwise and edgewise bending moments from the measured strains. An experimental setup that enables pitching the specimen from 0 ° to 180 ° was used to experimentally verify the theoretical findings. The theory and the experimental results showed a fair agreement.

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Authors and Affiliations

  1. Dept. of Mechanical and Mechatronics Engineering, Kangwon National University, 192-1, Hyoja 2-dong, Chuncheon, Gangwondo, South Korea, 200-701

    Changhwan Kim, Kwansoo Kim, Hyungyu Kim, Insu Paek, Neungsoo Yoo & Yoonsu Nam

  2. Dept. of Aerospace Engineering, Politecnico di Milano, Via La Masa 34, Milan, Italy, 20156

    Filippo Campagnolo & Carlo Bottasso

Authors
  1. Changhwan Kim
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  2. Kwansoo Kim
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  3. Hyungyu Kim
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  4. Insu Paek
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  5. Neungsoo Yoo
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  6. Yoonsu Nam
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  7. Filippo Campagnolo
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  8. Carlo Bottasso
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Corresponding author

Correspondence to Insu Paek.

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Kim, C., Kim, K., Kim, H. et al. A method to estimate bending moments acting on a wind turbine blade specimen using FBG sensors. Int. J. Precis. Eng. Manuf. 13, 1247–1250 (2012). https://doi.org/10.1007/s12541-012-0166-4

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  • DOI: https://doi.org/10.1007/s12541-012-0166-4

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