A Study regarding the Technical-Economical Optimization of Structural Components for enhancing the Buckling Resistance in Stiffened Cylindrical Shells

IF 1.5 0 ENGINEERING, MULTIDISCIPLINARY Engineering, Technology & Applied Science Research Pub Date : 2023-10-13 DOI:10.48084/etasr.6135

Maria Tanase, Dragos Gabriel Zisopol, Alexandra Ileana Portoaca

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Abstract

This paper presents a technical-economical optimization by maximizing the ratio between the critical buckling pressure (technical characteristic) and the production cost (economic characteristic) of stiffened cylindrical shells, a basic concept of value analysis. Critical buckling load values were determined using both the Finite Element Method (FEM) and analytical calculations to validate the accuracy of the results obtained. The maximum difference between the analytical and numerical results was 10%. Technical-economic optimization was carried out using the design of experiments method with MINITAB 19 and allowed to select the optimal input parameters, stiffener dimensional ratio 0.10, shell wall thickness 2.50 mm, and distance between circumferential stiffeners 400 mm, and identify the main factors that impact the output response. For the optimal constructive configuration, the ratio between the critical buckling load and the production cost of the stiffened cylindrical shells was maximized by 199%.

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提高加劲圆柱壳结构构件抗屈曲性能的技术经济优化研究

本文提出了一种价值分析的基本概念，即最大化加劲圆柱壳的临界屈曲压力(技术特性)与生产成本(经济特性)之比的技术经济优化。采用有限元法和解析计算方法确定了临界屈曲载荷值，验证了计算结果的准确性。分析结果与数值结果的最大差异为10%。采用MINITAB 19设计试验法进行技术经济优化，选择最优输入参数:加筋板尺寸比0.10、壳壁厚度2.50 mm、周向加筋板间距400 mm，确定影响输出响应的主要因素。在最优构造构型下，加筋圆柱壳的临界屈曲载荷与生产成本之比最大，达到199%。

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