풍력에너지저널 (Journal of Wind Energy)

  • 제13권3호
  • /
  • Pages.13-21
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  • 2022
  • /
  • 2093-5099(pISSN)
  • /
  • 2733-9467(eISSN)
한국풍력에너지학회 (Korea Wind Energy Association)
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대형 풍력 블레이드의 비틀림 주파수 측정에 관한 고찰

A study on the torsional frequency measurement of wind turbine blades

  • 김지훈 (한국재료연구원, 복합재료연구본부) ;
  • 문진범 (한국재료연구원, 복합재료연구본부) ;
  • 강민규 (한국재료연구원, 복합재료연구본부) ;
  • 이우경 (한국재료연구원, 복합재료연구본부) ;
  • 김시현 (한국재료연구원, 복합재료연구본부) ;
  • 박지상 (한국재료연구원, 복합재료연구본부)
  • 투고 : 2022.05.16
  • 심사 : 2022.07.12
  • 발행 : 2022.09.30
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초록

When a wind turbine is designed, the dynamic stability of the system as well as the dynamic characteristics of the main components such as blades, hub, main shaft and tower must be evaluated. In particular, the natural frequencies of a blade, as a main load-generating component, need to be measured and assessed by component level testing. In conventional practice, the natural frequencies of a blade are determined as the measured frequencies near the reference frequencies provided by FE analysis results. But the reference frequencies are also uncertain since designers have difficulty distinguishing the torsional mode shape among the analysis results due to the complexity of its mode shape. So, in conventional practice, the determination of a measured torsional frequency inevitably contains uncertainty. Therefore, a novel method to definitely determine the torsional frequencies from the experimental data itself is necessary. In this paper, a new methodology to measure the torsional frequency of a blade was studied from the perspective of a modal test procedure, data processing method and mode determination logic. Finally, the validity of the method that can measure torsional frequency without reference FE analysis results was verified by applying it to an actual large wind turbine blade

키워드

과제정보

본 연구는 산업통상자원부의 재원으로 한국에너지기술평가원의 지원을 받아 수행한 신재생에너지핵심기 술개 발사업 (No.20183010025150, No.20183010025120)의 연구결과입니다.

참고문헌

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