Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Study on Application of Equivalent Stiffness Modeling Method for Static Aeroelastic Analysis of Large Scale Wind Turbine Rotor System

대형 풍력로터시스템의 정적 공탄성해석을 위한 등가강성모델링 기법 적용에 관한 연구

  • Cha, Jin-Hyun (Department of Aerospace Engineering, Pusan National Univ.) ;
  • Ku, Tae-Wan (Industrial Liaison Innovation Center, Pusan National Univ.) ;
  • Kim, Jeong (Department of Aerospace Engineering, Pusan National Univ.) ;
  • Kang, Beom-Soo (Department of Aerospace Engineering, Pusan National Univ.) ;
  • Song, Woo-Jin (Industrial Liaison Innovation Center, Pusan National Univ.)
  • 차진현 (부산대학교 항공우주공학과) ;
  • 구태완 (부산대학교 부품소재산학협력연구소) ;
  • 김정 (부산대학교 항공우주공학과) ;
  • 강범수 (부산대학교 항공우주공학과) ;
  • 송우진 (부산대학교 부품소재산학협력연구소)
  • Received : 2012.05.09
  • Accepted : 2012.08.18
  • Published : 2012.11.01
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Abstract

A equivalent stiffness modeling has been performed for extracting the equivalent stiffness properties which are orthotropic elastic model from a large scale wind turbine rotor blade so that structure model can be constructed more simply for the three dimensional static aeroelastic analysis. In order to present the procedure of equivalent stiffness modeling, NREL 5MW class wind turbine rotor having the three stiffness information which are flapewise, edgewise and torsional stiffness was chosen. This method is based on applying unit moment at the tip of the blade as well as fixing all degree of freedom at the blade root and calculating the displacement from the load analysis to obtain the elastic modulus corresponding to equivalent stiffness referred to the NREL reports on blade divided into 5 sections respectively. In addition, one section was divided into 3 parts and the trend functions were used to make the equivalent stiffness model more correctly and quickly. Through the comparison of stiffness between the reference values and calculated values from equivalent stiffness model, the investigation of the accuracy on the stiffness values and the efficiency for constructing the model was conducted.

Keywords

References

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