Abstract
At present, frustum tower is widely used in the large wind turbine on the international wind electric market, which is a typical high drumstick and dumbbell type high-rise structure, whose mechanical characteristics and design methods have some particularity. In this paper, using the finite element program SAP2000, the primary selection tower was carried on the static strength and stiffness analyses, some control indexes which affect the tower design were studied. Based on the FEM analysis results, combining with a great deal of model calculations, this kind of tower were optimized. Research results show that the material utilization rate of wind turbine tower is low, and that the top displacement and stiffness of the tower is the controlling factors of design. Based on the optimization results, a new tower with straight lower part and frustum upper part is proposed, which can increase stiffness of tower, improve the material utilization, and reduce the overall steel amount of tower.
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