| 金属体积成形过程的自适应无网格方法 |
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| 引用本文： | 干年妃,李光耀,钟志华,韩利芬.金属体积成形过程的自适应无网格方法[J].中国机械工程,2006,17(24):2612-2617. |
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| 作者姓名： | 干年妃 李光耀 钟志华 韩利芬 |
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| 作者单位： | 1. 湖南大学汽车车身先进设计制造国家重点实验室,长沙,410082
2. 湘潭大学,湘潭,411105 |
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| 基金项目： | 国家自然科学基金;国家自然科学基金 |
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| 摘 要： | 采用动态显式自适应无网格RKPM方法的计算格式，在有效误差估计模型的基础上进行节点加密，采用区域分解思想确定新的计算模型中节点的影响域半径，对金属体积成形过程进行了全过程的计算机模拟。Taylor Bar冲击的自适应无网格计算结果与实验结果吻合良好，有效地验证了该方法的正确性和可行性。挤压算例的计算结果也表明该算法能提高计算精度和改善板内应变能误差。
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| 关 键 词： | 金属体积成形 自适应无网格方法 误差估计 节点加密 影响域半径 |
| 文章编号： | 1004-132X（2006）24-2612-06 |
| 收稿时间： | 2005-12-05 |
| 修稿时间： | 2005-12-05 |
Adaptive Meshfree Method on Bulk Forming Process |
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| Gan Nianfei,Li Guangyao,Zhong Zhihua,Han Lifen.Adaptive Meshfree Method on Bulk Forming Process[J].China Mechanical Engineering,2006,17(24):2612-2617. |
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| Authors: | Gan Nianfei Li Guangyao Zhong Zhihua Han Lifen |
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| Affiliation: | 1. State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha, 410082 2. Xiangtan University, Xiangtan, Hunan, 411105 |
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| Abstract: | An adaptive meshfree method was used to simulate the bulk forming process. Starting from interpolation errors in RKPM, an error estimator was constructed based on the computed and reference cell energy. A domain refinement was completed on high error areas. The radius of the influence domain of a node was updated by domain decomposition method. The result comparison be tween adaptive RKPM and experiments for Taylor bar impact have justified the effectiveness of the adaptive meshfree method. The bulk forming example also indicates this algorithm can improve the precision of numerical results and balance the error distribution. |
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| Keywords: | bulk forming process adaptive meshfree method error estimation refinement influ ence domain radius |
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