| LS—DYNA3D等非线性结构动力响应分析程序的局限性 |
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| 引用本文： | 赵隆茂 杨桂通 等. LS—DYNA3D等非线性结构动力响应分析程序的局限性[J]. 计算力学学报, 2001, 18(4): 473-477 |
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| 作者姓名： | 赵隆茂 杨桂通 等 |
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| 作者单位： | 太原理工大学, |
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| 基金项目： | 山西省自然科学基金 ( 991 0 0 6 )，山西省留学归国人员基金资助项目 |
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| 摘 要： | 通过理论分析和数值算例研究了采用LS－DYNA3D等非线性动力响应分析有限元程序于具有较大刚体转动的结构时，可能出现错误的应力和应变计算结果。主要原因是采用增量形式的应力修正时，其客观性被破坏。这是此类工程软件亟待改进的问题之一。
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| 关 键 词： | 有限元 动力响应 应力修正 客观性原理 LS－DYNA3D 非线性结构 刚体转动 强冲击载荷 |
| 文章编号： | 1007-4708(2001)04-0473-05 |
| 修稿时间： | 1999-11-15 |
Potential limitations of numerical procedures in using nonlinear analysis codes have need to be highlighted |
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| ZHAO Long mao,YANG Gui tong. Potential limitations of numerical procedures in using nonlinear analysis codes have need to be highlighted[J]. Chinese Journal of Computational Mechanics, 2001, 18(4): 473-477 |
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| Authors: | ZHAO Long mao YANG Gui tong |
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| Abstract: | The potential limitations of numerical procedures in computing the strain and stress of structures subjected to impact loading and their roots are investigated with analysis and numerical examples in this paper. Inaccurate stress and strain results of structures when large rotations are involved may be obtained using nonlinear dynamic codes, such as LS DYNA3D. No maintaining incremental stress update objectivity is main reasons. These deficiencies of the codes available should be improved. |
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| Keywords: | finite element methods dynamic response stress update objectivity DYNA3D |
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