用于加固局部受损结构的拓扑优化设计:非梯度定向进化法

IF 4.4 2区 工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS
Ping Yuan , Yafu Cai , Biqin Dong , Lei Wang
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引用次数: 0

摘要

现有的非梯度拓扑优化算法在对受损结构进行加固设计时需要进行大量的目标函数评估,导致计算成本巨大。本研究提出了一种非梯度定向进化(NGDE)拓扑优化方法,用于加固局部受损的 RC 结构。首先,开发了加固材料(RM)组件的拓扑描述策略,以减少设计变量的数量。然后,通过定位上一迭代步骤中混凝土损伤最大的区域,给出 RM 样本的定向生成准则。随后,采用包含突变、交叉和选择的随机扰动操作来增强 RM 样本的多样性。在此基础上,提出了 RM 组件的元素去除和尺寸调整策略,以克服数值不稳定性。最后,通过数值实例说明了所提方法的适用性和有效性。结果表明,所提出的方法可有效生成合理的 RM 配置,用于加固受损的 RC 结构,而无需依赖设计灵敏度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Topology optimization design for strengthening locally damaged structures: A non-gradient directed evolution method

Existing non-gradient topology optimization algorithms require numerous objective function evaluations for reinforcement design of damaged structures, resulting in huge computational costs. In this study, a non-gradient directed evolution (NGDE) topology optimization method is proposed for strengthening locally damaged RC structures. First, a topology description strategy for reinforcement material (RM) component is developed to reduce the number of design variables. Then, a directed generation criterion of RM samples is given by locating the regions with the maximum concrete damage from the previous iteration step. Subsequently, the random disturbance operation, incorporating mutation, crossover, and selection, is employed to enhance the diversity of RM samples. On this basis, the element removal and size adjustment strategies of RM components are presented to overcome the numerical instability. Finally, the applicability and effectiveness of the proposed method is illustrated by the numerical examples. Results show that the proposed method can effectively generate a reasonable RM configuration for strengthening damaged RC structures without relying on design sensitivity.

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来源期刊
Computers & Structures
Computers & Structures 工程技术-工程:土木
CiteScore
8.80
自引率
6.40%
发文量
122
审稿时长
33 days
期刊介绍: Computers & Structures publishes advances in the development and use of computational methods for the solution of problems in engineering and the sciences. The range of appropriate contributions is wide, and includes papers on establishing appropriate mathematical models and their numerical solution in all areas of mechanics. The journal also includes articles that present a substantial review of a field in the topics of the journal.
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