利用结构优化技术为骨骼结构建立设计信息生成模型

IF 4.4 2区 工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS
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引用次数: 0

摘要

虽然各种结构优化技术都有坚实的数学基础,但在制造阶段,优化设计的结构坚固性和实际可施工性仍是一个巨大的挑战。本文介绍了一种源于结构优化和工程原理的自动化新方法,通过这种方法,结构优化设计中的离散构件可实现最佳利用。所开发的工作流程将拓扑、布局和尺寸优化统一在一个参数化平台中,随后输出一个可随时制造的 CAD 骨架模型,该模型可通过加成法或装配法制造。所有这些输出都会根据标准实践规范对结构要求、强度、刚度和稳定性进行检查和验证。在实施过程中,首先要生成拓扑优化模型,并通过骨架化将其转换为一像素宽的链模型。在此,本文采用了一种新颖高效的方法,通过在域边界附近使用像素填充来提取骨架。其次,从骨架中提取空间框架,以优化其成员尺寸和布局。最后,使用构造实体几何树生成 CAD 模型,并对每个构件的结构完整性进行评估,以确保制造前的结构稳健性。文中介绍的各种实例展示了所介绍的工作流程在各种结构工程应用中的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Design-informed generative modelling of skeletal structures using structural optimization

Although various structural optimization techniques have a sound mathematical basis, the structural robustness and practical constructability of optimal designs pose a great challenge in the manufacturing stage. This paper presents an automated novel approach stemming from structural optimization and engineering principles, where discrete members of the structurally optimized designs are driven towards optimal utilization. The developed workflow unifies topology, layout and size optimization in a single parametric platform, which subsequently outputs a ready-to-manufacture CAD skeletal model which can be manufactured either additively or by assembly. All such outputs are checked and validated for structural requirements; strength, stiffness and stability in accordance with standard codes of practice. In the implementations, first, a topology-optimal model is generated and converted to a one-pixel-wide chain model using skeletonization. Herein, this paper uses a novel efficient method to extract the skeleton by using pixel-padding near the domain borders. Secondly, a spatial frame is extracted from the skeleton for its member size and layout optimization. Finally, the CAD model is generated using constructive solid geometry trees and the structural integrity of each member is assessed to ensure structural robustness prior to manufacturing. Various examples presented in the paper showcase the validity of the presented workflow across various structural engineering applications.

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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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