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| 基于移动网格法的流动旋压快速仿真方法研究 |
| Fast Simulation Strategy of Flow Forming Based on Moving Mesh Method |
| Received:November 11, 2023 |
| DOI：10.3969/j.issn.1674-6457.2024.02.001 |
| 中文关键词: 移动网格法 流动旋压 网格生成 数据传递 快速仿真 |
| 英文关键词: moving mesh method flow forming mesh generation data remapping fast simulation |
| 基金项目:广东省基础与应用基础研究基金(2019B1515120047);国家自然科学基金(52130507) |
| Author Name | Affiliation | | ZHAN Mei | Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Guangdong Shenzhen 518057, China
School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China | | ZHAI Zhuolei | Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Guangdong Shenzhen 518057, China
School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China | | DONG Yunda | Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Guangdong Shenzhen 518057, China
School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China | | FAN Xiaoguang | School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China | | YANG Yiyang | School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China |
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| 中文摘要: |
| 目的 针对筒形件流动旋压有限元仿真中因网格模型规模庞大而导致的计算极端耗时问题，提出一种基于移动网格法动态控制网格密度的高效仿真算法，并验证该算法的高效性与可靠性。方法 移动网格法包括局部加密全六面体网格的动态重构与新旧网格间的数据传递两部分。针对平滑过渡的局部加密网格构造提出了维度分离弹簧比拟法以快速动态重构，并采用三次样条曲线来精确描述工件的几何形状以保证网格重构过程的一致性。在数据传递过程中，为避免冗长的邻域搜索步骤，采用自适应反距离加权插值算法提升传递效率。根据上述算法，设计编制了基于动力显式有限元求解器ABAQUS/Explicit的移动网格法插件，以实现快速仿真模型的连续计算。结果 基于移动网格法插件，建立了单旋轮筒形件流动旋压的快速仿真模型。与全加密网格相比，采用移动网格法的仿真模型可在获得精确几何形状的同时提速2~4倍。结论 所提出的算法可实现筒形件流动旋压的高效仿真，同时可结合并行计算进一步提高仿真效率。 |
| 英文摘要: |
| The finite element (FE) simulation of tube spinning requires a very long computing time due to the large-scale mesh model. The work aims to propose an efficient simulation algorithm based on the moving mesh method that dynamically controls the mesh density and verify the efficiency and reliability of this algorithm. This algorithm could be divided into two parts:dynamic construction of the locally refined hexahedron mesh and data remapping between the old and new mesh. The locally refined mesh was generated and regenerated by dimensional-separated spring analogy method. Meanwhile, the geometric shape of model was precisely described by the cubic spline curves to guarantee the consistency of the mesh reconstruction process. To expedite the data remapping process, the adaptive inverse distance weighted interpolation algorithm was employed to circumvent the laborious neighbor seeking stage. The aforementioned algorithm was used to design and compile a moving mesh method plug-in with the dynamically explicit FE method solver ABAQUS/Explicit, enabling continuous computation of the fast simulation. Based on this plug-in, a fast simulation model of tube spinning with one roller was established. Compared with the fully refined mesh, this simulation model adopting the moving mesh could obtain the correct geometry of the workpiece and enhance the speed by 2-4 times. The proposed algorithm can efficiently simulate the tube spinning process and can further improve the simulation efficiency when combined with the parallel computing. |
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