Load mitigation of wind turbine blade by aeroelastic tailoring via unbalanced laminates composites
- Title
- Load mitigation of wind turbine blade by aeroelastic tailoring via unbalanced laminates composites
- Author
- 하성규
- Keywords
- Bend-twist coupling; Ply-thickness unbalance; Fatigue load reduction; Collective-pitch demand
- Issue Date
- 2015-09
- Publisher
- ELSEVIER SCI LTD
- Citation
- COMPOSITE STRUCTURES, v. 128, Page. 122-133
- Abstract
- The parametric study of unbalanced tri-axial non-crimp fabrics laminates, typically used in the blade skin layup, showed that the highest bend-twist coupling up to 0.56 was achieved when all three kinds of unbalances (i.e. ply-angle, ply-material and ply-thickness unbalances) were simultaneously present in the laminates. Based on aeroelastic tailoring via unbalanced laminates, the bend-twist coupling towards feather of various degrees was implanted to the skin layup of a variable-speed collective-pitch controlled 5 MW wind turbine rotor blades and fully-coupled aero-servo-elastic analyses were performed. The results showed that when the ply-thickness unbalance is added in the skin layup, in addition to already existing ply-angle and ply-material unbalances, an average increase in the coupling magnitude by approximately 51% along the blade length and a reduction in fatigue load and collective-pitch demand by approximately 1.6-2.9% and 5.5-19.9% across the range of applied stochastic winds ranging from 7 m/s to 23 m/s. (C) 2015 Elsevier Ltd. All rights reserved.
- URI
- http://www.sciencedirect.com/science/article/pii/S0263822315002159http://hdl.handle.net/20.500.11754/27500
- ISSN
- 0263-8223; 1879-1085
- DOI
- 10.1016/j.compstruct.2015.03.042
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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