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Behavior study of prestressed concrete wind-turbine tower in circular cross-section

机译:圆形横截面预应力混凝土风力涡轮机塔的行为研究

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In this work, we sought to study the behavior of prestressed concrete wind-turbine tower in circular crosssection. The idea was to use Genetic Algorithm to obtain a structural optimization of the projected tower. Thus, a tower with the shape of a conical section was obtained, which minimizes the appearance of stress concentrations in the structure. The tower has a tapered profile to reduce the area subjected to wind thus lower the total weight and applied moment. It will also enhance the dynamic response of the tower and improve its overall stability. Steel tubular wind turbine towers are most widely utilized for wind turbines, however, the use of concrete material is becoming more attractive for wind towers because concrete towers are more stable for buckling failure. As the turbine size is growing and the towers are rising in height, steel towers are required to be sufficiently strong and stiff, consequently leading to high construction costs. Therefore, the prestressed concrete wind-turbine tower has a reduced construction cost compared to the steel tubular wind turbine towers or the selfsupporting steel truss towers with a maximum height of 150 m. For this, Computer-Aided Engineering (CAE) tools were used and a 100 m prestressed concrete tower system for a wind turbine was optimized. It is concluded that the model met all the restrictions described and represents an economy in raw material and greater simplicity of design in relation to the octagonal model used for comparison. A new structural methodology was described for the study and application of prestressed concrete to replace the steel towers currently used.
机译:在这项工作中,我们试图研究预应力混凝土风力涡轮塔在圆形横截面中的行为。该想法是利用遗传算法获得预计塔的结构优化。因此,获得了具有锥形部分形状的塔,这使得结构中的应力浓度的外观最小化。塔具有锥形轮廓,以减小受风的区域,从而降低总重量和施加的时刻。它还将增强塔的动态响应,提高其整体稳定性。钢管风力涡轮机塔最广泛用于风力涡轮机,然而,使用混凝土材料对风塔变得更具吸引力,因为混凝土塔对屈曲失效更稳定。随着涡轮机的尺寸越来越大,塔在高度上升,钢塔需要足够强大和僵硬,因此导致高建筑成本。因此,预应力混凝土风力涡轮机塔与钢管管式风力涡轮机塔或自带钢桁架塔相比,建筑成本降低,最大高度为150米。为此,使用了计算机辅助工程(CAE)工具,并优化了一种用于风力涡轮机的100米预应力混凝土塔系统。得出结论是,该模型符合所描述的所有限制,并表示原料中的经济性以及与用于比较的八角形式的设计更简单。描述了一种新的结构方法,用于研究和应用预应力混凝土以取代目前使用的钢塔。

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