TopoRestruct – Converting topology optimization results into a design geometry, which meets the requirements for manufacturability, functionality and mechanical stress in the product development process

TopoRestruct â 将拓扑优化结果转换为设计几何形状，满足产品开发过程中对可制造性、功能性和机械应力的要求

• 批准号: 411012054
• 负责人: Professor Dr.-Ing. Sandro Wartzack
• 金额: --
• 依托单位: Lehrstuhl für Konstruktionstechnik (KTmfk)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/411012054?language=en
• 关键词: TopoRestruct; Converting; topology; optimization; results

Modern methods for topology optimization that are based on the finite element analysis allow a robust and simple calculation of lightweight designs that are suitable for the given mechanical requirements for almost any load case. Despite the possibility of considering production constraints during optimization, the result - represented as a triangulated surface mesh - is merely an abstract design proposal. As a design proposal, this cannot be used directly in the product development process or is usually not feasible in this way. The further design of the product in a parametric associative or feature-based 3D CAD system therefore requires an interpretation and reconstruction of the topology optimization result. When considering the state of the art in research and technology, only methods for the extraction of constructive geometry from topology optimization results are available, which allow either a non-parametric surface based redesign or a parametric redesign which is limited to special cases and does not allow a generalized interpretation. Accordingly, the main objective of this research project is to provide a method for the automated, feature-based CAD redesign of topology optimization results during the development process, which meets the requirements for manufacturability, functionality and mechanical stress.To this end, three essential tasks are carried out in this research project. The development of a method for the complete analysis and decomposition of the topology optimized result mesh in an analytical form (I). This makes it possible to describe the topology of the optimization result mathematically with the aim of geometric design analysis and synthesis. In order to allow an interpretation and restructuring of the decomposition for common manufacturing processes in a functional and stress-related manner, a knowledge base and building blocks with corresponding design and interpretation rules will be developed (II). The final step is the integration of the decomposition methods and the knowledge base together with the building blocks (I and II) into a prototypical application. The application demonstrates the automated redesign of topology optimization results into feature-based CAD geometry and makes the method generally usable (III).At the end of the project, a proven and automated method is available to the product developer that enables the automated conversion of topology optimization results into an engineering design model, which meets the requirements for manufacturability, functionality and mechanical stress.

基于有限元分析的现代拓扑优化方法可以对轻量级设计进行稳健且简单的计算，适合几乎任何负载情况下的给定机械要求。尽管在优化过程中可以考虑生产限制，但结果（表示为三角表面网格）仅仅是一个抽象的设计方案。作为设计方案，它不能直接用于产品开发过程，或者这种方式通常不可行。因此，在参数化关联或基于特征的 3D CAD 系统中进一步设计产品需要对拓扑优化结果进行解释和重建。当考虑研究和技术的最新水平时，只有从拓扑优化结果中提取构造几何的方法可用，这些方法允许基于非参数表面的重新设计或仅限于特殊情况且不允许广义解释的参数重新设计。因此，本研究项目的主要目标是提供一种在开发过程中对拓扑优化结果进行自动化、基于特征的 CAD 重新设计的方法，以满足可制造性、功能性和机械应力的要求。 为此，本研究项目完成了三项基本任务。开发一种以分析形式对拓扑优化结果网格进行完整分析和分解的方法 (I)。这使得以数学方式描述优化结果的拓扑成为可能，以达到几何设计分析和综合的目的。为了能够以功能和应力相关的方式解释和重组常见制造过程的分解，将开发具有相应设计和解释规则的知识库和构建块（II）。最后一步是将分解方法和知识库与构建块（I 和 II）一起集成到原型应用程序中。该应用演示了将拓扑优化结果自动重新设计为基于特征的 CAD 几何结构，并使该方法普遍可用 (III)。在项目结束时，产品开发人员可以使用经过验证的自动化方法，将拓扑优化结果自动转换为工程设计模型，满足可制造性、功能和机械应力的要求。