Initial guess of rigid plastic finite element method in hot strip rolling
文献类型：期刊论文
| 作者 | G. L. Zhang ; S. H. Zhang ; J. S. Liu ; H. Q. Zhang ; C. S. Li ; R. B. Mei |
| 刊名 | Journal of Materials Processing Technology
 |
| 出版日期 | 2009 |
| 卷号 | 209期号:4页码:1816-1825 |
| 关键词 | Rigid plastic finite element method Strip rolling Initial guess Neural network metal-forming processes neural-network diagonal matrix simulation force mill fem |
| ISSN号 | 0924-0136 |
| 中文摘要 | Although the rigid plastic finite element method (RPFEM) is extremely efficient and particularly suitable for analyzing the strip rolling, it is unavailable for online application due to the large computational time. During iterative solution of RPFEM, the convergence speed is greatly determined by the initial guess. In this paper, three different initial guesses are constructed through Engineering method, G Functional and Neural Network, respectively. Especially, the back propagation neural network model for predicting the relative velocity field (nodal velocities/roll speed) is trained from huge amounts of RPFEM results. Whereafter, the initial guess is calculated by multiplying the predicted relative velocity field by the roll speed. The numerical examples of seven passes hot strip rolling are provided to show the solution efficiency and the accuracy of RPFEM code in the cases of different initial guess. Compared with other two methods, the Neural Network has the remarkable advantages to reduce the CPU time and the iterations of RPFEM code. From the numerical results, it is found that the CPU time, stability and the accuracy of RPFEM code in the initial guess by the Neural Network can meet the requirements of online control completely in hot strip rolling. (c) 2008 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/32532]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | G. L. Zhang,S. H. Zhang,J. S. Liu,et al. Initial guess of rigid plastic finite element method in hot strip rolling[J]. Journal of Materials Processing Technology,2009,209(4):1816-1825. |
| APA | G. L. Zhang,S. H. Zhang,J. S. Liu,H. Q. Zhang,C. S. Li,&R. B. Mei.(2009).Initial guess of rigid plastic finite element method in hot strip rolling.Journal of Materials Processing Technology,209(4),1816-1825. |
| MLA | G. L. Zhang,et al."Initial guess of rigid plastic finite element method in hot strip rolling".Journal of Materials Processing Technology 209.4(2009):1816-1825. |
入库方式： OAI收割
来源：金属研究所
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