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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。
In order to minimize design costs for a steel tower used to install a wind turbine, the tower structure is a micro-conical welded-ring ribbed-shell steel structure. The 45m high steel shell was modeled using three cylindrical shell element assemblies, each with a height of 15m and a constant average diameter and thickness. Wind loads were calculated according to Eurocode 1, Part 2 ~ 4 according to Eurocode 1. The design considers the buckling of the shell and the local buckling of the ring rib. Ribs are necessary to prevent the tower from becoming oval. To calculate production costs, consider the cost of machining these steels into nearly cylindrical shapes and the cost of assembling the soldered parts. Minimizing costs includes minimizing material and production costs. The most appropriate shell thickness, the number of rings and the diameter of Rosenbrock method using direct calculation. The results show that the fewer the number of ring ribs, the lower the cost. This method can be used to predict the minimum design cost of a micro-conical tower to meet the needs of an elongated structure that bends the structure to a major load due to dynamic loads.