首页> 外文会议>Design automation conference;ASME international design engineering technical conferences and computers and information in engineering conference >TOPOLOGY, SHAPE, AND SIZE OPTIMIZATION OF ADDITIVELY MANUFACTURED LATTICE STRUCTURES BASED ON THE SUPERFORMULA
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TOPOLOGY, SHAPE, AND SIZE OPTIMIZATION OF ADDITIVELY MANUFACTURED LATTICE STRUCTURES BASED ON THE SUPERFORMULA

机译:基于超公式的网格化结构的拓扑,形状和大小优化

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This paper investigates the application of Superformida for structural synthesis. The focus is set on the lightiveight design of parts that can be realized using discrete lattice structures. While the design domain will be obtained using the Superfor-mula, a tetrahedral meshing technique will be applied to this domain to generate the topology of the lattice structure. The motivation for this investigation stems from the property of the Superformida to easily represent complex biological shapes, which opens a possibility to directly link a structural synthesis to a biomimetic design. Currently, numerous results are being reported showing the development of a wide range of design methods and tools that first study and then utilize the solutions and principles from the nature to solve technical problems. However, none of these methods and tools quantitatively utilizes these principles in the form of nature inspired shapes that can be controlled parametrically. The motivation for this work is also in part due to the mathematical formulation of the Superformida as a generalization of a superellipse, which, in contrast to the normal surface modeling offers a very compact and easy way to handle set of rich shape variants with promising applications in structural synthesis. The structural synthesis approach is organized as a volume minimization using Simulated Annealing (SA) to search over the topology and shape of the lattice structure. The fitness of each of candidate solutions generated by SA is determined based on the outcome of lattice member sizing for which an Interior Point based method is applied. The approach is validated with a case study involving inline skate wheel spokes.
机译:本文研究了Superformida在结构合成中的应用。重点放在可以使用离散晶格结构实现的零件的轻巧设计上。虽然将使用Superfor-mula获得设计域,但将四面体网格化技术应用于该域以生成晶格结构的拓扑。进行这项研究的动机来自于超级甲壳虫(Superformida)的特性,即易于代表复杂的生物形状,这为直接将结构合成与仿生设计联系起来提供了可能性。当前,报告了众多结果,显示了广泛的设计方法和工具的发展,这些方法和工具首先研究然后利用自然界的解决方案和原理来解决技术问题。但是,这些方法和工具都没有以可以参数化控制的自然启发形状的形式定量地利用这些原理。进行这项工作的动机也部分是由于Superformida的数学公式表示为超级椭圆的推广,与正常的曲面建模相比,Superformida提供了一种非常紧凑且容易的方法来处理具有丰富应用前景的丰富形状变体集在结构合成中。使用模拟退火(SA)将结构综合方法组织为体积最小化,以搜索晶格结构的拓扑和形状。由SA生成的每个候选解的适合度是基于应用基于内部点方法的晶格成员大小确定的结果来确定的。该方法已通过涉及直排轮滑轮辐的案例研究得到验证。

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