中文摘要：

风力机预弯叶片的弯曲型线和铺层结构设计之间存在着耦合关系．为了实现叶片预弯型线和铺层结构的一体化设计，提出一种预弯型线和铺层结构的参数化表达方法。并通过实例验证了叶片有限元参数化建模分析方法的正确性；构建了预弯叶片弯曲型线和铺层结构的一体化优化设计模型，采用粒子群算法，以叶片的质量最小为优化目标，在满足材料强度、叶尖最大变形、振动频率的约束条件下，对某低风速850kW非预弯叶片进行预弯及铺层层数优化设计．优化结果显示，优化叶片在满足设计约束的条件下重量减少了15．26％，验证了文中提出的预弯叶片弯曲型线及铺层结构协同优化设计方法的正确性．

英文摘要：

For the pre-bending blade of wind turbines, there exists a coupling relationship between the bending curve design and the layer structure design. In order to realize the integrated design of the pre-bending curve and the layer structure of a wind turbine blade, a parametric expression of the pre-bending curve and the layer structure is proposed. Then, the parametric modeling method for the blade finite element model is proved to be correct by an example. On this basis, an integrated optimal design model is constructed for the pre-bending curve and the layer structure, and the particle swarm algorithm is adopted to optimize the pre-bending curve and the layer structure of a 850 kW wind turbine blade, so as to minimize the blade mass under the constraints of the material strength, the maximum deformation of the blade tip and the vibration frequency. It is found that the blade weight decreases by 15.26% under the above constraints, which confirms the correctness of the proposed optimal design method.