复合材料是一种比强度和比模量均较高的材料，通过铺层角的优化设计，在一定范围内还可以改变其性能，提高其承载能力。复合材料已在大型风机叶片结构设计中获得成功应用。叶片是风力机受力最为复杂的部件，也是最重要的部件之一。风力机想要获得较高的风能利用系数和较大的经济效益，其基础就是设计良好的叶片。近年从全球风力发电的现状和趋势来看，风电装机容量逐年上升，其根本原因就在于风力发电所具有的环保性和可再生性，因此风力发电还有巨大的发展空间。本文结合叶片的工作特性对某大型风机复合材料叶片进行了有限元分析，为保证风机叶片结构设计的可靠性及经济性提供了依据。
Composite material has higher ratio of strength to weight and ratio of stiffness to weight than other ma-terials,and may change its performance within a certain range to raise its bearing capacity by layer lay-up optimiza-tion design. Composite materials have been successfully applied in the design of large wind turbine blade. Blade is one of the most important parts of wind turbine and bears more complicated loading. Well-designed blade can gain higher power coefficient and better economic profit. From the state of art and trend of wind power generation in the world,the installed capacity increases year by year. Considering its environmental protection and renewability,there is a huge space for development of wind power generation. Finite element analysis of a composite blade was performed in this paper with considering the work characteristics of the blade. This work can be em-ployed to evaluate the reliability and economic efficiency in design of blade structure.
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