Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Damage Estimation Method for Monopile Support Structure of Offshore Wind Turbine

모노파일 형식 해상풍력발전기 지지구조물의 손상추정기법

  • 김상렬 (한국기계연구원 기계시스템안전연구본부) ;
  • 이종원 (남서울대학교 건축공학과) ;
  • 김봉기 (한국기계연구원 기계시스템안전연구본부) ;
  • 이준신 (한국전력공사 전력연구원)
  • Received : 2012.04.30
  • Accepted : 2012.06.20
  • Published : 2012.07.20
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Abstract

A damage estimation method for support structure of offshore wind turbine using modal parameters is presented for effective structural health monitoring. Natural frequencies and mode shapes for a support structure with monopile of an offshore wind turbine were calculated considering soil condition and added mass. A neural network was learned based on training patterns generated by the changes of natural frequency and mode shape due to various damages. Natural frequencies and mode shapes for 10 prospective damage cases were input to the trained neural network for damage estimation. The identified damage locations and severities agreed reasonably well with the accurate damages. Multi-damage cases could also be successfully estimated. Enhancement of estimation result using another parameters as input to neural network will be carried out by further study. Proposed method could be applied to other type of support structure of offshore wind turbine for structural health monitoring.

Keywords

References

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