Stress validation of finite element model of a small-scale wind turbine blade
DOI:
https://doi.org/10.17159/2413-3051/2019/v30i2a6355Abstract
Wind turbine blades are the first mechanical part of a wind turbine that interacts with the wind and hence play a key role in wind power generation. It is important that the wind turbine blade is tested for structural integrity in accordance to design code IEC 61400-23 such as strain limits, fatigue life, blade tip clearance limit, and surface stress. This paper aims to focus on the calculation and validation of static bending stresses in the blade; it presents the experimental and simulated stress analysis of a small-scale wind turbine blade. The simulation and 3D design software ANSYS, version 19.0 is used in the finite element analysis (FEA). By using FEA, we aim to capture the stress generated on the blade geometry under static loading and unloading conditions. As a first step towards this, the finite element results were validated against experimental results on a kestrel E230i turbine blade. The wind turbine blade was fixed at one end, loaded, and unloaded statically at three selected points. The finite element results are calculated within a 25% error margin of the experimental results. A reverse engineering procedure was used to determine the appropriate ANSYS model blade properties that were used as the exact material properties were not available from the manufacturer.
Downloads
References
Thorstensson, E., 2009. Small-scale wind turbines: Introductory market study for Swedish conditions. Chalmers University of Technology.
Wind Energy Policy Issues: Wind energy resource guide: Most frequently asked questions. Accessed from-http://www.culturechange.org/wind.htm on 14/10/2016.
Brøndsted, P. and Nijssen, R.P. (Eds). 2013. Advances in wind turbine blade design and materials. Woodhead.
Chen, X., Zhao, W., Zhao, X. and Xu, J., 2014. Failure test and finite element simulation of a large wind turbine composite blade under static loading. Energies, 7(4), pp.2274-2297.
Kong, C., Bang, J. and Sugiyama, Y. 2005. Structural investigation of composite wind turbine blade considering various load cases and fatigue life. Energy, 30(11–12 SPEC. ISS.), pp. 2101–2114. doi: 10.1016/j.energy.2004.08.016
Fernandez, G., Usabiaga, H. & Vandepitte, D. 2018. An efficient procedure for the calculation of the stress dis-tribution in a wind turbine blade under aerodynamic loads. Journal of Wind Engineering and Industrial Aero-dynamics, 172(November 2017), pp.42–54.
IEC International Standard. Wind turbine generator system – Part I: safety requirements; 1994.
Technical Note: IEC 1400-1 GL Test Regulation, 2000.
Germanischer Lloyd. 1999. Regulations for the certification of the wind energy conversion system. Germany: Germanischer Lloyd.
International Electrotechnical Commission. 2001. Technical specification IEC TS 61400-23 wind generator sys-tems – part 23: Full-scale structural testing of rotor blades.
Overgaard, L.C.T., Lund, E. & Thomsen, O.T., 2010. Structural collapse of a wind turbine blade. Part A: Static test and equivalent single layered models. Composites Part A: Applied Science and Manufacturing, 41(2), pp.257–270. Available at: http://dx.doi.org/10.1016/j.compositesa.2009.10.011.
Inomata, N., Tsuchiya, K. and Yamada, S., 1999. Measurement of stress on blade of NEDO's 500 kW prototype wind turbine. Renewable energy, 16(1-4), pp.912-915.
Kong, C., Bang, J. and Sugiyama, Y. 2005. Structural investigation of composite wind turbine blade considering various load cases and fatigue life, Energy, 30(11–12 SPEC. ISS.), pp. 2101–2114. doi: 10.1016/j.energy.2004
Berring, P., Branner, K., Berggreen, C. and Knudsen, H.W. 2007, July. Torsional performance of wind turbine blades-Part 1: Experimental investigation. In 16th International Conference on Composite Materials (Vol. 43). Japan Society for Composite Materials.
Jensen, F.M., Falzon, B.G., Ankersen, J. and Stang, H., 2006. Structural testing and numerical simulation of a 34 m composite wind turbine blade. Composite structures, 76(1-2), pp.52-61.
Yang, J., Peng, C., Xiao, J., Zeng, J., Xing, S., Jin, J. and Deng, H., 2013. Structural investigation of composite wind turbine blade considering structural collapse in full-scale static tests. Composite Structures, 97, pp.15-29.
Overgaard, L.C., Lund, E. and Thomsen, O.T., 2010. Structural collapse of a wind turbine blade. Part A: Static test and equivalent single layered models. Composites Part A: Applied Science and Manufacturing, 41(2), pp.257-270.
Jørgensen, E.R., Borum, K.K., McGugan, M., Thomsen, C.L., Debel, C.P. and Sørensen, B.F., 2004. Full scale testing of wind turbine blade to failure-flap wise loading. Forskningscenter Risoe, Denmark.
Debel, C.P., 2004. Identification of damage types in wind turbine blades tested to failure. In Dansk Metallurgisk Selskabs vintermøde 2004. DMS.
Chen, X., Zhao, W., Zhao, X. and Xu, J., 2014. Failure test and finite element simulation of a large wind turbine composite blade under static loading. Energies, 7(4), pp.2274-2297.
Jureczko, M.E.Z.Y.K., Pawlak, M. and Mężyk, A., 2005. Optimisation of wind turbine blades. Journal of materi-als processing technology, 167(2-3), pp. 463-471.
Zhou, H.F., Dou, H.Y., Qin, L.Z., Chen, Y., Ni, Y.Q. and Ko, J.M., 2014. A review of full-scale structural testing of wind turbine blades. Renewable and Sustainable Energy Reviews, 33, pp.177-187.
E.M. Fagan, M. Flanagan, S.B. Leen, T. Flanagan, A. Doyle, J. Goggins. 2017. Physical experimental static test-ing and structural design optimization for a composite wind turbine blade. Composite Structures, 164, pp.90-103.
H. Shi, C. Tian, R. Zhang, D. Yu and T. Ueda, 2012. Effect of sampling rate on the accuracy of strain gage meas-urement during printed circuit board functional test. 13th International Conference on Electronic Packaging Technology & High Density Packaging, Guilin, 2012, pp. 903-908.
Downloads
Published
Issue
Section
License
Copyright (c) 2019 Tolulope Babawarun, Wei Hua Ho, Harry Ngwangwa
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
.png){kind=spacer}