Journal of Wind Energy (풍력에너지저널)

Korea Wind Energy Association (한국풍력에너지학회)
권호 표지
DOI QR코드

DOI QR Code

Analytic Study on Dual Calibration Methods for Wind Blade Fatigue Tests Using Finite Element Models

유한요소모델을 활용한 풍력 블레이드의 피로 시험용 이축 캘리브레이션 기법 구축을 위한 해석적 연구

  • Jinbong Kim ;
  • Si-Hyun Kim ;
  • Min-Gyu Kang ;
  • Woo-Kyoung Lee ;
  • Geunsu Joo
  • 김진봉 (한국재료연구원, 복합재료연구본부) ;
  • 김시현 (한국재료연구원, 복합재료연구본부) ;
  • 강민규 (한국재료연구원, 복합재료연구본부) ;
  • 이우경 (한국재료연구원, 복합재료연구본부) ;
  • 주근수 (한국재료연구원, 복합재료연구본부)
  • Received : 2022.07.21
  • Accepted : 2022.08.22
  • Published : 2022.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

This paper presents a rational methodology to calculate the bending moment distribution for fatigue tests of wind blades using the pairs of the strain gauges attached on the surfaces of wind blades. The methodology is based on the equation for the strains as functions of their positions and bending stiffness under the pure bending of the asymmetric cross section of a beam. The equation is used to simultaneously calculate flapwise and edgewise bending moment distribution of the wind blade brought by single or even dual axis fatigue tests. The appropriate position and selection scheme of strain gauges on a blade section were proposed through the observation of the strains on blade surfaces simulated with the finite element analysis for the full 3D shell model of a 100m-length-grade wind blade. The blade bending moment distribution calculated from the strains using the proposed methodology has shown to have very small dependency on the gauge positions and selections of the gauge pairs.

Keywords

Acknowledgement

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

References

  1. Ribrant, J. and Bertling L., 2009, "Survey of failures in wind power systems with focus on Swedish wind power plants during 1997-2005," 2007 IEEE Power Engineering Society General Meeting, Tampa, FL, USA
  2. Yang, M., Chenbing, H. and Xinxin, F., 2012, "Institutions functions and failure statistics and analysis of wind turbine," Physics Procedia, Vol. 24, pp.25~30
  3. Maria, P. P. J., Pedro, G. M. F., Andrew, T. and Mayorkinos P., 2013, "Wind turbine reliability analysis," Renewable and Sustainable Energy Reviews, Vol. 13, pp.463~472
  4. Lin, Y., Tu, L., Uu H. and Li W., 2016, "Fault anaysis of wind turbines in China," Renewable and Sustainable Energy Reviews, Vol. 55, pp.482~490
  5. Ha, J. M. and Choi, S., Youn B. D., Han B. and Oh H., 2013, "A Strategic Study on Data Classification and Management for Optimal Condition Monitoring System in Wind Turbines," Journal of Wind Energy, Vol. 4, No. 2, pp. 25~33 (in Korean).
  6. Lee, D. H. and Seo, Y. H., Kim Y. K. and Kang J. G., 2019, "CMS Commissioning and Alarm Setting for Offshore Wind Turbine Diagnosis," Journal of Wind Energy, Vol. 10, No. 4, pp. 43~49 (in Korean).
  7. Top 3 Types of Wind Turbine Failure, Available online:https://www.firetrace.com/fire-protection-blog/wind-turbine-failure, accessed on May 11, 2020
  8. GL, 2010, 1 Guideline for the certification of wind turbines, IV Rules and Guidelines Industrial Services, Germanischer Lloyd
  9. GL, 2012, 2 Guideline for the certification of offshore wind turbines, IV Rules and Guidelines Industrial Services, Germanischer Lloyd
  10. IEC, 2019, Wind Energy Generation Systems Part I: Design Requirements, EC 61400-1, International Electrotechnical Commission.
  11. IECRE, 2014, Wind Turbine Part 23: Full-scale structural testing of rotor blades, IEC 61400-23, International Electrotechnical Commission.
  12. Mshnaevsky, L., 2022, "Root Causes and Mechanisms of Failure of Wind Turbine Blades- Overview," Materials (Basel), Vol. 15, No. 9, pp.482~490, pp.2959
  13. Kim, J. and Kim, J, 2019, "Experimental Verification of Advanced Bending Moment Measurement in Blade Fatigue Test using Dual-Axis Calibration Method," The 2020 Fall Conference of Korea Wind energy Association, Jeju, Korea (in Korean)
  14. Castro, O. Berring, P., Branner K. Hvejsel, C. F. Yeniceli, and Belloni, F., 2021, "Bending-moment-based approach to match damage-equivalent strains in fatigue testing," Engineering Structures, Vol. 226, pp. 111325
  15. Ansel C. Ugural and Saul K. Fenster, 2019, H Advanced Mechanics of Materials and Applied Elasticity, 6th Edition," Pearson
  16. Greave, Peter R., Dominy, Robert G., Ingram, Grant L., Long, Hui and Court, Richard, 2011, "Evaluation of dual-axis fatigue testing of large wind turbine blades," Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, Vol. 226, No. 6, pp.1693-1704
  17. White, D., 2004, New Method for Dual-Axis Fatigue Testing of Large Wind Turbine Blades Using Resonance Excitation and Spectral Loading, NREL/TP-500-35268