风力涡轮钢结构塔楼的优化设计

为了使用于安装风力涡轮机的钢结构塔楼设计成本最小化,该塔楼结构形式为一个微锥形的焊接环肋壳体钢结构。用3个柱形壳单元组件来模拟45m高的钢壳,每个单元都有15m高,并且都有恒定的平均直径和厚度。根据欧洲规范1第2～第4章(Eurocode1,Part2～4)计算风荷载。设计中考虑壳体屈曲和环肋的局部屈曲。环肋非常必要,它可以阻止塔楼变成椭圆形。为计算生产成本,要考虑将这些钢壳加工为接近圆柱形状的加工成本和组装焊接部件的成本。成本最小化包括材料和生产成本最小化。最适宜的壳厚度、环肋的个数和直径采用Rosenbrock法直接计算。结果表明,采用环肋的数量越少,成本就越低。这个方法可以被用来预测微锥形塔楼的最小设计成本,满足细长型结构的需要,这种结构以动力荷载导致的弯曲为结构的主要荷载。

Optimisation of a steel tower for a wind turbine structure

The purpose of the research presented in this paper is to obtain a design that will minimise the cost of a steel tower for a wind turbine.The wind turbine tower investigated is constructed from a slightly conical ring-stiffened welded steel shell.This 45 m high shell is modelled by three stacked cylindrical shell segments,each 15 m in length and each having constant average diameter and thickness.The wind load is calculated according to Eurocode 1 Part 2-4.Design constraints on shell buckling and local buck...