| 矩形锥壳在外压作用下分叉稳定性分析 |
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| 引用本文： | 林西强,任钧国. 矩形锥壳在外压作用下分叉稳定性分析[J]. 国防科技大学学报, 1998, 20(1): 18-22 |
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| 作者姓名： | 林西强 任钧国 |
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| 作者单位： | 长沙国防科技大学航天技术系!长沙，410073，长沙国防科技大学航天技术系!长沙，410073 |
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| 摘 要： | 用8结点三维退化壳体单元与非线性有限元法分析了矩形锥壳在外压作用下的稳定性问题。加载过程采用增量方法，计算出位移、应变与载荷的变化曲线。在分叉型失稳时，位移和应变发生突变，以此作为失稳的准则，便于工程检测。计算结果与实验进行了比较，说明此方法可以用于工程分析。
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| 关 键 词： | 壳 分叉 稳定性 有限元法 |
| 收稿时间： | 1997-03-20 |
The Bifurcated Stability Analysis of Rectangle Conical Shell under External Pressure |
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| Lin Xiqiang and Ren Junguo. The Bifurcated Stability Analysis of Rectangle Conical Shell under External Pressure[J]. Journal of National University of Defense Technology, 1998, 20(1): 18-22 |
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| Authors: | Lin Xiqiang and Ren Junguo |
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| Abstract: | Applying 8-nodes degenerated element and non-linear finite element method, the stability of rectangle conical shell under external pressure has been studied. Using the decrement methodin the loading process, the curves of displacements and strains vs pressure have been obtained. Numerical and experimental results show that while bifurcated unstability occurs, the displacements andstrains would sharply change and this can be used as a rule in the engineering analysis. |
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| Keywords: | shell bifurcation stability finite element method. |
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