Abstract
Blade certification in the wind industry starts with coupon testing of materials and eventually culminates with full-scale blade testing. Coupon testing is not always representative of the materials’ performance and full-scale testing is expensive and time consuming. Subcomponent testing can bridge this gap and increase the assurance of blade manufacturers for introducing new materials and designs into wind industry. In this study, similitude theory is applied to the I-beam structure of a utility-scale wind turbine blade to design scaled down models that emulate the dynamic characteristics of the full-scale I-beam. The governing equations of motion for vibration of a thin walled laminated I-beam are analyzed to derive the scaling laws. Derived scaling laws are used as a design criterion to develop models that can accurately predict the fundamental frequency of the full-scale I-beam. Both complete and partial similarity cases are investigated. The distorted layup scaling technique is introduced as a novel approach to design scaled down composite models with totally different layups than the full-scale component. According to the results, depending on the desired size of the scaled models and ply scheme of the full-scale I-beam, models could be found with very good accuracy in predicting the fundamental frequency of the full-scale I-beam using derived scaling laws.
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References
Mandell, J.F., Combs, D., Samborsky, D.D.: Fatigue of fiberglass beam substructures. Wind Energy 16, 99 (1995)
Cairns, D.S., Skramstad, J.D., Mandell, J.F. Evaluation of hand lay-up and resin transfer molding in composite wind turbine blade structures. In: 20th 2001 ASME Wind Energy Symposium, 2001
Mandell, J.F., Creed Jr., R., Pan, Q., Combs, D.W., Shrinivas, M.: Fatigue of fiberglass generic materials and substructures. Wind Energy 15, 207 (1994)
Sayer, F., Post, N., Van Wingerde, A., Busmann, H., Kleiner, F., Fleischmann, W., Gansow, M.: Testing of adhesive joints in the wind industry. In: European Wind Energy Conference and Exhibition 2009, EWEC 2009, pp. 288–315 (2009)
Sayer, F., Antoniou, A., Van Wingerde, A.: Investigation of structural bond lines in wind turbine blades by sub-component tests. Int. J. Adhes. Adhes. 37, 129–135 (2012)
Zarouchas, D.S., Makris, A.A., Sayer, F., Van Hemelrijck, D., Van Wingerde, A.M.: Investigations on the mechanical behavior of a wind rotor blade subcomponent. Compos. B Eng. 43, 647–654 (2012)
Jensen, F.M., Falzon, B.G., Ankersen, J., Stang, H.: Structural testing and numerical simulation of a 34 m composite wind turbine blade. Compos. Struct. 76, 52–61 (2006)
White, D., Musial, W., Engberg, S.: Evaluation of the B-REX fatigue testing system for multi-megawatt wind turbine blades. In Collection of the 2005 ASME Wind Energy Symposium Technical Papers at the 43rd AIAA Aerospace Sciences Meeting and Exhibit, pp. 52–65 (2005)
Simitses, G.J., Rezaeepazhand, J.: Structural similitude for laminated structures. Compos. Eng. 3, 751–765 (1993)
Rezaeepazhand, J., Simitses, G.J.: Use of scaled-down models for predicting vibration response of laminated plates. Compos. Struct. 30, 419–426 (1995)
Rezaeepazhand, J., Simitses, G.J., Starnes Jr., J.H.: Design of scaled down models for stability of laminated plates. Aiaa j. 33, 515–519 (1995)
Simitses, G.J., Rezaeepazhand, J.: Structural similitude and scaling laws for buckling of cross-ply laminated plates. J. Thermoplast. Compos. Mater. 8, 240–251 (1995)
Rezaeepazhand, J., Simitses, G.J., Starnes Jr., J.H.: Design of scaled down models for predicting shell vibration response. J. Sound Vib. 195, 301–311 (1996)
Rezaeepazhand, J., Simitses, G.J.: Structural similitude for vibration response of laminated cylindrical shells with double curvature. Compos. B Eng. 28, 195–200 (1997)
Eydani Asl, M., Niezrecki, C., Sherwood, J., Avitabile, P.: Predicting the vibration response in subcomponent testing of wind turbine blades. In: Proceedings of the IMAC-XXXIII, Orlando, 2–5 February 2015
Eydani Asl, M., Niezrecki, C., Sherwood, J., Avitabile, P.: Application of structural similitude theory in subcomponent testing of wind turbine blades. In: Proceedings of the American Society for Composites 2014, La Jolla, 8–10 September 2014
Eydani Asl, M., Niezrecki, C., Sherwood J., Avitabile, P.: Similitude analysis of composite I-beams with application to subcomponent testing of wind turbine blades. In: SEM 2015 Annual Conference and Exposition on Experimental and Applied Mechanics, Costa Mesa, 8–11 June 2015
Vo, T.P., Lee, J.: Flexural–torsional coupled vibration and buckling of thin-walled open section composite beams using shear-deformable beam theory. Int. J. Mech. Sci. 5l, 631–641 (2009)
Griffith, D.T., Ashwill, T.D.: The Sandia 100-meter all-glass baseline wind turbine blade: SNL100-00, Sandia National Laboratories, Albuquerque, Report no.SAND2011-3779, 2011
Reddy, J.N.: Mechanics of Laminated Composite Plates and Shells: Theory and Analysis. CRC press, Boca Raton (2004)
Acknowledgments
This material is based upon work supported by the National Science Foundation under Grant Number 1230884 (Achieving a Sustainable Energy Pathway for Wind Turbine Blade Manufacturing). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
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Asl, M.E., Niezrecki, C., Sherwood, J., Avitabile, P. (2016). Design of Scaled-Down Composite I-Beams for Dynamic Characterization in Subcomponent Testing of a Wind Turbine Blade. In: Brandt, A., Singhal, R. (eds) Shock & Vibration, Aircraft/Aerospace, Energy Harvesting, Acoustics & Optics, Volume 9. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-30087-0_18
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DOI: https://doi.org/10.1007/978-3-319-30087-0_18
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