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中文摘要：
采用风力机叶片梁帽的厚度和宽度为优化设计变量，在保证气动外形不变，质量不增加的情况下，以获得最大截面挥舞刚度为设计目标，使用改进粒子群算法对叶片截面进行优化设计，建立了一种风力机叶片的截面刚度优化设计模型。算例结果表明：合理的设计梁帽的厚度和宽度能得到更好的截面挥舞刚度，验证了模型的有效性。优化结果对结构设计具有一定的参考价值。
英文摘要：
An optimization design model was developed to optimize the wind turbine blade sectional stiffness. In this model, the thickness and the width of the spar caps are chosen as the optimization variables. The optimization objection is making the flap stiffness of the section have maximum value while keeping fixed aerodynamic profile and not increasing the mass. An improved particle swarm optimization （PSO） algorithm was used to do the section optimization design. Results of the computational example show that designing the thickness and the width of the spar caps reasonably can get better sectional flap stiffness. So It also verifies that this model is efficient. The optimization results have some certain guiding value for structural design
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