This paper proposes a methodological approach for the multi-objective optimization of steel towers made from prefabricated cylindrical stacks that are typically used in the oil and gas sector. The goal is to support engineers in designing economical products while meeting structural requirements. The multi-objective optimization approach involves the minimization of the weights and costs related to the manufacturing and assembly phases. The method is based on three optimization levels. The first is used in the preliminary design phase when a company receives a request for proposal. Here, minimal information on the order is available, and the time available to formulate an offer is limited. Thus, parametric cost models and simplified 1-D geometries are used in the optimization loop performed by genetic algorithms. The second phase, the embodiment design phase, starts when an offer becomes an order based on the results of the first stage. Simplified shell geometries and advanced parametric cost models are used in the optimization loop, which present a restricted problem domain. In the last phase involving detailed design, a full 3-D computer-aided design model is generated, and specific finite-element method simulations are performed. The cost estimations, given the high levels of detail considered, are analytic and are performed using dedicated software.

中文翻译：

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模块化钢塔制造成本与结构优化的多目标序贯法

本文提出了一种多目标优化钢塔的方法论方法，该钢塔由通常用于石油和天然气行业的预制圆柱形烟囱制成。目标是支持工程师在满足结构要求的同时设计经济的产品。多目标优化方法涉及最小化与制造和组装阶段相关的重量和成本。该方法基于三个优化级别。第一个用于在公司收到提案请求时的初步设计阶段。在这里，关于订单的信息很少，可用于制定报价的时间是有限的。因此，参数化成本模型和简化的一维几何被用在由遗传算法执行的优化循环中。第二阶段，实施设计阶段，根据第一阶段的结果，当报价变成订单时开始。优化循环中使用了简化的壳几何结构和先进的参数化成本模型，它们呈现了一个受限的问题域。在涉及详细设计的最后阶段，生成完整的 3-D 计算机辅助设计模型，并执行特定的有限元方法模拟。考虑到高水平的细节，成本估算是分析性的，并使用专用软件执行。生成完整的 3-D 计算机辅助设计模型，并执行特定的有限元方法模拟。考虑到高水平的细节，成本估算是分析性的，并使用专用软件执行。生成完整的 3-D 计算机辅助设计模型，并执行特定的有限元方法模拟。考虑到高水平的细节，成本估算是分析性的，并使用专用软件执行。