关键词: 铺角优化, 连续性约束, 对称性约束, 复合材料, 风力机叶片

Abstract: In the design process of composite structure, necessary manufacturing constraints that satisfies the requirements of structure performance and production process shall be considered to make it conform to the engineering practice. Based on the theory of composite laminates and the discrete material optimization method, the optimization problem of ply parameters of composite laminates is transformed into the optimization of fiber angle distribution of discrete multiphase materials. The patch optimization mathematical model of micro fiber ply angle for composite laminates is established in this paper, which takes the element ply angle as design variable, the minimum compliance as the objective function, the continuity and sum of design variables as the constraint. The optimization results of composite laminate with continuity constraints and a wind turbine blade with continuity and symmetry constraints indicated that the optimized ply scheme considering continuity and symmetry constraints can effectively improve the structure performance, avoid warping deformation, reduce the probability of matrix cracking, which is more suitable for manufacturing requirement.

Key words: ply angle optimization, continuity constraints, symmetry constraint, composite, wind turbines blade