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| Study on parallel computation of nonlinear inverse motion method based on PETSc library |
| Received:February 20, 2021 Revised:June 10, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20210220001 |
| KeyWord:inverse motion analysis nonlinear analysis finite element method parallel computation PETSc |
| Author | Institution |
| 范志瑞 |
大连理工大学 工业装备结构分析国家重点实验室, 工程力学系, 大连 |
| 阎军 |
大连理工大学 工业装备结构分析国家重点实验室, 工程力学系, 大连 |
| 牛斌 |
大连理工大学 机械工程学院, 大连 |
| 隋倩倩 |
大连理工大学 工业装备结构分析国家重点实验室, 工程力学系, 大连 |
| 许琦 |
大连理工大学 工业装备结构分析国家重点实验室, 工程力学系, 大连 |
| 蒋存存 |
大连理工大学 工业装备结构分析国家重点实验室, 工程力学系, 大连 |
| 赵国忠 |
大连理工大学 工业装备结构分析国家重点实验室, 工程力学系, 大连 |
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| Abstract: |
| In the finite element analysis considering geometric nonlinearity,the initial configuration and deformed configuration are strictly distinguished.And the deformed configuration is of great significance to the realization of structural performances and functions.The traditional nonlinear finite element analysis is mainly employed to the design problem driven by the initial configuration,which is difficult for problems driven by the deformed configuration.Thus,nonlinear inverse motion analysis method is introduced in this study.To improve the efficiency of nonlinear inverse motion analysis,a parallel-analysis framework based on PETSc library is proposed.The corresponding sub-modulus of the framework,parallel data storage and interaction,as well the lock of communication and the remedy using load balance are presented in detail.In the numerical examples,through the comparison of the results of the forward and the inverse motion analysis,differences between the two analysis approaches and also the accuracy of form finding by inverse motion analysis are revealed.After that,the efficiency of the parallel-analysis is investigated by using different numbers of MPI processes.Numerical results show that a reasonable selection of the number of MPI processes can significantly improve the efficiency of the inverse motion analysis. |
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