Strength optimization of large wind turbine blade root on the genetic algorithm

For improving the ability of fiber reinforced plastic blades, especially for the maximal bending moment of the blade root, the theory of genetic algorithm(GA) was studied and applied in the optimization of the root laminate of composite blades. In allusion to the separate characteristic of the lamination shell design parameter, the integer code strategy suitable for the GA optimizing design of composite lamination shells was proposed. In analyzing the structural intensity of laminated shells, the fitness function of GA was established to optimize the structure intensity. Referencing a number of layup rules, under the condition of four different directions of the ply angles, the stacking sequence of the blade root was optimized. The result shows that there are many advantages in dealing with disperse problem, and the method is reliable and feasible.