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.

基于有限元分析的拓扑优化方法的现代方法允许对几乎所有负载案例的给定机械需求的轻巧设计进行稳健而简单的计算。尽管在优化过程中可能会考虑生产约束，但结果（表示为三角形的表面网格）只是一个抽象的设计建议。作为一项设计建议，这不能直接在产品开发过程中使用，也不能以这种方式不可行。因此，在参数关联或基于特征的3D CAD系统中对产品的进一步设计需要解释和重建拓扑优化结果。在考虑研究和技术方面的最新技术时，只有从拓扑优化结果中提取建设性几何形状的方法，这允许基于非参数的基于表面的重新设计或参数重新设计，该重新设计仅限于特殊情况并且不允许广义解释。因此，该研究项目的主要目的是为开发过程中拓扑优化结果的自动化，基于功能的CAD重新设计的方法提供一种方法，该结果满足了对生产性，功能和机械压力的要求。为了在此研究项目中执行三个基本任务。以分析形式（i）的拓扑优化结果网格的完整分析和分解方法的开发。这使得数学设计分析和合成的目的是数学上描述优化结果的拓扑结构。为了允许以功能性和压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件（II）。最后一步是分解方法和知识基础与构建块（i和ii）的集成到原型应用中。该应用程序证明了拓扑优化结果的自动重新设计为基于特征的CAD几何形状，并使该方法通常可用（III）。在项目的末尾，可以使用验证和自动化的方法，可以使用该方法开发人员使用，使拓扑优化结果可以自动转换为工程设计模型，以满足制造能力，功能和机械性，功能和机械性，功能和机械性，功能和机械性，功能和机械性。