| 袁潮,张啸,邱松.基于动力学找形方法的非连续多重曲面拓扑重构研究[J].包装工程,2022,43(10):158-168. |
| 基于动力学找形方法的非连续多重曲面拓扑重构研究 |
| Discontinuous B-rep Geometry Topology Reconstruction in Dynamic Form-finding Method |
| 投稿时间：2022-01-02 |
| DOI：10.19554/j.cnki.1001-3563.2022.10.019 |
| 中文关键词: 动力学找形 重拓扑 参数化设计 网格映射 有限元分析 数据闭环 |
| 英文关键词: dynamic form-finding retopology parametric design mesh mapping finite element analysis data closed loop |
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| 中文摘要: |
| 目的 通过重拓扑高效地将工业建模工程中的多重曲面(B-rep)文件转化成均匀连续的网格(Mesh)文件，为参数化设计、有限元分析工作提供对接桥梁，形成参数化设计工作流闭环。方法 基于Rhino平台下的算法插件，将预设有杆件弹簧力、边界锚固力、目标吸引力等约束的基础网格，包覆到已知多重曲面上，并通过动力学算法多次迭代收敛，将重拓扑网格无限趋近于原曲面，最终重构为均匀连续、网格数可控的四边网格。结果 经过此工艺流程后，设计师只需几步点选操作，在几分钟内即可对非连续多重曲面进行重拓扑工作，获得的新网格均匀连续，且面数可控，省去了大量人力修复时间。结论 通过动力学算法的重拓扑工艺，可使参数化设计师更顺畅地对接工厂，同时使有限元分析辅助支持设计更具效率，是工业设计数字闭环的重要技术基础之一。 |
| 英文摘要: |
| This paper aims toconvert files of the Boundary Representation (B-rep)model in industrial modeling engineering to files of the Uniform continuous mesh model efficiently through retopology, which provides a bridge for parametric design and finite element analysis, further construct a closed loop of parametric design workflow. Through algorithm plug-in based on Rhino platform, the basic mesh preset many constraints such as the spring force of the rod, the anchoring force of the boundary and the attractive force of the target is wrapped onto known B-rep shapes. And through dynamic multiple iteration algorithms, the retopology mesh is infinitely approached to the original surface. Finally, the basic mesh is reconstructed into a uniformly continuous four-sided mesh with a controllable number. After this process, the designer only needs to do a few clicks operation, and the discontinuous B-rep shaper can be re-topological within a few minutes. The new mesh obtained is uniform and continuous, and the number of faces is controllable, saving a lot of manpower repair time.By providing retopology method based on dynamic algorithm, parametric designer can Connect factories more smoothly, and finite element analysis will be more efficient to aided support design. It is one of the important technical foundations of industrial design digital closed loop. |
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