ABSTRACT Depending on the requirements, the design of a product may result in very different solutions. Topological optimisation is a mathematical tool that can be used to obtain lighter parts without decreasing their stiffness. As the optimised part shapes are often too complex to be manufacturable, additive manufacturing is generally used. Usually, the topological optimisation is performed on a single part. However, for a product, the decreasing of mass and inertia in each individual part has an impact on the loads applied onto all the parts of the system. Moreover, different paths can be used to optimise a product, e.g. optimising all the parts simultaneously or part after part. Therefore, the aim of this paper is to propose, based on a case study, some optimisation principles to find the best optimisation path to design an additively manufactured product. In order to do this, the concept of topological optimisation loops is first proposed. Then, several optimisation paths are compared. In comparison with a usual single topological optimisation, the proposed method leads to an additional gain in mass of up to 35% for the case study. Finally, some optimisation principles are suggested to choose the most adapted path according to the designer objectives.

中文翻译：

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优化增材制造多组分产品的一些原则

摘要 根据要求，产品的设计可能会产生非常不同的解决方案。拓扑优化是一种数学工具，可用于在不降低刚度的情况下获得更轻的零件。由于优化的零件形状通常太复杂而无法制造，因此通常使用增材制造。通常，拓扑优化是在单个零件上执行的。然而，对于产品而言，每个单独部件的质量和惯性的减小会对施加在系统所有部件上的载荷产生影响。此外，可以使用不同的路径来优化产品，例如同时优化所有部件或部件一个接一个地优化。因此，本文的目的是在案例研究的基础上提出，一些优化原则，以找到设计增材制造产品的最佳优化路径。为此，首先提出了拓扑优化循环的概念。然后，比较几个优化路径。与通常的单一拓扑优化相比，所提出的方法使案例研究的质量额外增加了 35%。最后，提出了一些优化原则，根据设计者的目标选择最适合的路径。