Fatigue Analysis of MW Wind Turbine Top Flange

Abstract:

On the basis of the finite element analysis model of the wind turbine flange, this paper studies the fatigue damage of the MW wind turbine flange, analyzing the fatigue stress of the wind turbine flange with MSC.Marc/Mentat software, realizing load simulation of flange fatigue case with Bladed software, and calculating the fatigue loading spectrum of the flange with the method of rain flow circulation count. The fatigue damage calculation method which combines the rain flow circulation count method with Palmgren-Miner linear cumulative damage law, is proposed to modify the S-N curve of the flange material according to GL standard. The result shows the method feasible and reliable which provides one more accurate analysis idea for the fatigue life of the wind turbine generator system top flange.

• Periodical: Advanced Materials Research (Volumes 591-593)
• Pages: 722-727
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.591-593.722
• Online since: November 2012
• Authors: Rong Zhang
• Keywords: Fatigue Analysis, Flange, Rain Flow Circulation Count Method, Wind Turbine (WT)

References

[1] Information on http: //www.wwindea. org.

[2] Information on http: //www.gwec.net.

[3] L.F. Dong, Y.X. Zhong and Q.X. Ma. Prevention of the crackle defects in the flange casting of the large hydraulic turbine: Tsinghua Science and Technology,Vol. 40 (2008) No.5, p.16 (in Chinese)

[4] Y. Liu: Optimized research on the system dynamic model and key parts of the wind turbine (Mechanical Engineering, Chongqing University, China 2009), p.12(in Chinese)

[5] Germanischer Lloyd WindEnergie GmbH: Guideline for the Certification of Wind Turbines, 2010.

[6] G.J. Wang: Instruction of MSC. Fatigue Analysis Example (China Machine Press, China 2009), p.126(in Chinese)

[7] Passipoularidis.V.A, Philippidis and T.P. Brondsted.P. Fatigue life prediction in composites using progressive damage modelling under block and spectrum loading: International Journal of Fatigue, Vol. 52 (2011) No.7, p.98

DOI: 10.1016/j.ijfatigue.2010.07.011

[8] T.L. Panontin and S.D. Sheppard: Fatigue and Fracture Mechanics (American Society for Testing Material , America 1999), p.213

[9] J.Q. Xiao, D.X. Ding and P. Zhang. The application of the improved three peak-valley rain flow count method in the blasting vibration damage evaluation: Rock and Soil Mechanics, Vol. 30 (2009) No.1 , p.244(in Chinese)

[10] C.Y. Chen: Fatigue and Crack (Huazhong University of Science & Technology Press , China 2002), p.75(in Chinese)

[11] A.K. Khosrovanch and N.E. Dowling. Fatigue Loading History Reconstruction Based on the Rain-Flow Technique: International Journal of Fatigue, Vol. 12 (1990) No.2, p.99

[12] Information on http://www.cnwpem.com/news/6548_1.html

[13] H.Q. Sheng. The research on the fatigue loading spectrum of the converter: Acta Mechanica Solida Sinica, Vol. 29 (2008) No.1, p.32(in Chinese)