| 锥柱形膜片后屈曲的材料特性预示研究 |
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| 引用本文： | 周算,强洪夫,王广,王学仁.锥柱形膜片后屈曲的材料特性预示研究[J].力学与实践,2012,34(2):24-28. |
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| 作者姓名： | 周算 强洪夫 王广 王学仁 |
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| 作者单位： | 第二炮兵工程学院, 西安 710025 |
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| 基金项目： | 国家973计划资助项目 |
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| 摘 要： | 使用正交表设计数值试验, 分析弹性模量、屈服强度、延伸率等材料特性参数对锥柱形膜片结构后屈曲状态的影响, 预示材料特性对膜片翻转的影响. 正交数值试验在不影响结果科学性的基础上, 极大地降低了试验次数. 数值试验结果表明: 在一定结构情况下, 弹性模量与屈服强度对膜片正向翻转影响非常显著, 而延伸率的影响与前两个因素比较而言, 几乎可以忽略. 并且, 结构顶点位移随材料的弹性模量增大而增大; 随材料的屈服强度减小而增大.因此, 在结构固定的情况下, 为了提高材料的翻转性能, 可以选择弹性模量较大而屈服强度较小的材料, 且延伸率为20%左右最好.
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| 关 键 词： | 锥柱形膜片 材料特性 正交试验 数值分析 后屈曲 |
| 收稿时间： | 2011-10-24; |
EFFECTS OF MATERIAL PROPERTIES ON POST-BUCKLING OF SPHERICAL-CONE DIAPHRAGMS FOR POSITIVE EXPULSION TANKS |
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| ZHOU Suan,QIANG Hongfu,WANG Guang WANG Xueren.EFFECTS OF MATERIAL PROPERTIES ON POST-BUCKLING OF SPHERICAL-CONE DIAPHRAGMS FOR POSITIVE EXPULSION TANKS[J].Mechanics and Engineering,2012,34(2):24-28. |
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| Authors: | ZHOU Suan QIANG Hongfu WANG Guang WANG Xueren |
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| Affiliation: | Xi'an Hi-Tech Institute, Xi'an 710025, China |
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| Abstract: | This paper numerically analyzes the effects of elastic modulus,yield stress and elongation percentage on the post-buckling of spherical-cone diaphragms for positive expulsion tanks based on orthogonal tests.With orthogonal tests,the number of tests is greatly reduced,without affecting the validity of results.Numerical results are as follows:according to the specific diaphragm considered in the paper,its elastic modulus and yield stress have a marked effect on its post-buckling,while the elongation percentage hardly affects the post-bucking of the structure.The top node displacement of diaphragms increases with the increase of the elastic modulus and the decrease of the yield stress.As a result,large elastic modulus,small yield stress and about 20%of elongation will be optimal for diaphragm expulsion. |
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| Keywords: | spherical-cone diaphragms material properties orthogonal test numerical analysis post-buckling |
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