Structural Optimization of Composite Blades for Wind and Hydrokinetic Turbines Global Marine Renewable Energy Conference (GMREC VI) Almas Temple, Washington D.C. April 11, 2013 Image: Marine Current Turbines Danny Sale*, Alberto Aliseda*, and Michael Motley** *Dept. of Mechanical Engineering **Dept. of Civil & Environmental Engineering University of Washington Seattle, Washington, USA Ye Li, IEEE Senior Member National Wind Technology Center National Renewable Energy Laboratory Golden, Colorado, USA
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Structural Optimization of Composite Blades for Wind and Hydrokinetic Turbines
Global Marine Renewable Energy Conference (GMREC VI)Almas Temple, Washington D.C.
April 11, 2013
Image: Marine Current Turbines
Danny Sale*, Alberto Aliseda*, and Michael Motley***Dept. of Mechanical Engineering
**Dept. of Civil & Environmental EngineeringUniversity of WashingtonSeattle, Washington, USA
Ye Li, IEEE Senior MemberNational Wind Technology Center
National Renewable Energy LaboratoryGolden, Colorado, USA
● Identify Pareto frontier: set of “equally optimal” designs
● How do we select a design? Make trade-offs within set
Bill of Materials
J. Mandell, D. Samborsky, P. Agastra, A. Sears, and T. Wilson. "Analysis of SNL/MSU/DOE Fatigue Database Trends for Wind Turbine Blade Materials." Contractor Report SAND2010-7052, Sandia National Laboratories, Albuquerque, NM, 2010.
Development of a Design Tool for Wind and MHK Turbines● Code repositories help foster collaboration● Track usage statistics, feedback on desired code features
Conclusion
spar-uni: carbon
Progress to Date:● Developed design tools for wind & MHK devices
-method is generalized to a variety of turbine configurations-consider large number of design variables & constraints-focus on optimizing energy production, blade response, & reducing loads-reduce development time & lead to improved designs
Areas for Refinement:(short-term)
● Extend Monte Carlo analysis-geometric uncertainty (blade geom., ply angles, ply thickness)-modal analysis (natural frequencies, mode shapes)
(longer-term)● Need more validation! Especially stress/strain & buckling data● Tighter coupling between hydrodynamic & structural design● Coupling w/ unsteady fluid solver to study fluid-structure