Computer-Aided Design-Based Topology Optimization System With Dynamic Feature Shape and Modeling History Evolution
Computer-Aided Design-Based Topology Optimization System With Dynamic Feature Shape and Modeling History Evolution
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DOI：
10.1115/1.4045301
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发表时间：
2019-10
影响因子：
3.3
通讯作者：
Jikai Liu;A. To
中科院分区：
文献类型：
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作者：
Jikai Liu;A. To
传统的拓扑优化演示通常强调在专门定制的离散几何建模系统上建立的数值和优化细节，这与现有的计算机辅助设计（CAD）/计算机辅助工程（CAE）系统不兼容。因此，需要繁琐的预处理和后处理来提高可编辑性和可制造性，这既耗时又费力。因此，为了解决这个具有挑战性的问题，一个新的基于CAD的拓扑优化系统的开发在这项工作中。重点研究了以下几点：（1）通过宏文件传递特征和造型历史信息，解决了CAD与拓扑优化之间的互操作问题;然后，（ii）基于基于B样条的方法执行结构形状和拓扑优化，该方法从上游CAD模型继承原始样条信息，当然，可以返回用于优化的CAD模型生成的基于样条的几何信息，并且最后但最重要的一点是要提及的是，（iii）建模历史被并入优化过程中，并且基于最优性标准启用动态建模历史改变。最后一点很重要，因为基于历史的CAD建模仍然是主流方法，特别是考虑到出色的建模后可编辑性和设计意图捕获。
Conventional topology optimization presentations generally highlight the numerical and optimization details established on the specially customized discrete geometric modeling system, which is incompatible with the existing computer-aided design (CAD)/computer-aided engineering (CAE) systems. Therefore, tedious preprocessing and postprocessing are required to improve the editability and manufacturability, which are both time consuming and labor intensive. Hence, to address this challenging issue, a novel CAD-based topology optimization system is developed in this work. The following points are highlighted: (i) interoperability issue between CAD and topology optimization was addressed by using macro files to communicate the feature and modeling history information; then, (ii) structural shape and topology optimization is performed based on a B-spline-based approach, which inherits the original spline information from the upstream CAD model and of course, can return spline-based geometric information for optimized CAD model generation, and the last but the most important point to mention is that, (iii) modeling history was incorporated into the optimization process and dynamic modeling history change is enabled based on the optimality criteria. This final point is significant because history-based CAD modeling is still a main-stream approach, especially given the excellent postmodeling editability and design intent capture.