International Journal of Aeronautical and Space Sciences

  • 제12권4호
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  • Pages.346-353
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  • 2011
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  • 2093-274X(pISSN)
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  • 2093-2480(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
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Structural Performance Tests of Down Scaled Composite Wind Turbine Blade using Embedded Fiber Bragg Grating Sensors

  • Kim, Sang-Woo (School of Mechanical, Aerospace and Systems Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Eun-Ho (School of Mechanical, Aerospace and Systems Engineering, Korea Advanced Institute of Science and Technology) ;
  • Rim, Mi-Sun (School of Mechanical, Aerospace and Systems Engineering, Korea Advanced Institute of Science and Technology) ;
  • Shrestha, Pratik (School of Mechanical, Aerospace and Systems Engineering, Korea Advanced Institute of Science and Technology) ;
  • Lee, In (School of Mechanical, Aerospace and Systems Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kwon, Il-Bum (Center for Safety Measurement, Korea Research Institute of Standards and Science)
  • 투고 : 2011.10.30
  • 심사 : 2011.12.07
  • 발행 : 2011.12.30
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초록

In this study, the structural performance tests, i.e., static tests and dynamic tests of the composite wind turbine blade, were carried out by using the embedded fiber Bragg grating (FBG) sensors. The composite wind turbine blade used in the test is the 1/23 scale of the 750 kW composite blade. In static tests, the deflections along the blade were evaluated. Evaluations were carried out with simple beam theory and quadratic fitting method by using the embedded FBG sensors to predict the structural behavior with respect to the load. The deflections were compared to those obtained from the laser displacement sensor and electric strain gauges. They showed good agreement. Modal tests were performed to investigate the dynamic characteristics using the embedded FBG sensors. The natural frequencies obtained from the FBG sensors corresponding to the nine mode shapes of the blade were compared to those from the laser Doppler vibrometer. They were found to be consistent with each other. Therefore, it is concluded that the embedded FBG sensors have a great capability for measuring the structural performances of the composite wind turbine blade when structural performance tests are carried out.

키워드

참고문헌

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  2. Development of Liquid Metal Strain Gauge for Measuring WT Blade's Deformation vol.32, pp.3, 2015, https://doi.org/10.7736/KSPE.2015.32.3.307
  3. Effects of mechanical and geometric properties of adhesive layer on performance of metal-coated optical fiber sensors vol.47, 2013, https://doi.org/10.1016/j.ijadhadh.2013.09.018
  4. Testing, inspecting and monitoring technologies for wind turbine blades: A survey vol.22, 2013, https://doi.org/10.1016/j.rser.2012.12.056
  5. Analysis of flutter vibration response of large wind turbine blades under resonant loads vol.218, pp.1755-1315, 2019, https://doi.org/10.1088/1755-1315/218/1/012133