Multi-Objective Structural Design Optimization of a Wind Turbine Blade

Resumo

This paper studies the structural design of a 60m long 5MW wind turbine blade to achieve optimum
results using different optimization techniques. Due to the high aspect ratio of this component, its design involves

many challenges, including large deflections, stability, and aeroelastic phenomena. Therefore, it’s proposed an op-
timization problem with conflicting objectives and design constraints based on international standard IEC-61400-1

and Certification Guidelines. The two objective functions are the minimization of the structural weight of the blade
and the maximization of the first natural frequency of vibration. Using a parametrized Finite Element Model, the
composite layup of the blade, including the material of each ply, number of plies, and fiber orientation, are the
design variables. The results were compared to the reference blade developed by the National Renewable Energy
Laboratory (NREL) to validate the optimization strategy.