| 固体推进剂药柱泊松比随机粘弹性有限元分析 |
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| 引用本文： | 张海联,周建平. 固体推进剂药柱泊松比随机粘弹性有限元分析[J]. 推进技术, 2001, 22(3): 245-249 |
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| 作者姓名： | 张海联 周建平 |
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| 作者单位： | 国防科技大学航天与材料工程学院, |
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| 基金项目： | 国家杰出青年基金(19925209)和自然科学基金(19572027)资助项目。 |
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| 摘 要： | 为了研究泊松比的分布对固体推进剂药柱结构分析的影响，发展了一种地不可压缩材料的粘弹增量有限元方法，进行了泊松比随机粘弹性有限元的研究，要用局部平均方法对随机场进行离散，给出了二阶摄动有限 元变异方程。算例表明，对药桩进行随机模拟，计算效率和精度较高。
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| 关 键 词： | 推进剂药柱 粘弹性 不可压缩性 有限元法 泊松比 结构分析 固体推进剂 固体火箭 |
| 文章编号： | 1001-4055（2001）03-0245-05 |
| 修稿时间： | 2000-06-30 |
Viscoelastic stochastic finite element simulation of solid propellant grain with random Poisson’s ratio |
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| ZHANG Hai-lian and ZHOU Jian-ping. Viscoelastic stochastic finite element simulation of solid propellant grain with random Poisson’s ratio[J]. Journal of Propulsion Technology, 2001, 22(3): 245-249 |
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| Authors: | ZHANG Hai-lian and ZHOU Jian-ping |
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| Affiliation: | Inst. of Aerospace and Material Engineering, National Univ. of Defence Technology, Changsha 410073,China;Inst. of Aerospace and Material Engineering, National Univ. of Defence Technology, Changsha 410073,China |
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| Abstract: | A new type of viscoelastic incremental FEM suitable for incompressible materials was developed. Based on this, viscoelastic stochastic FEM under random Poisson’s ratio was investigated. The local averaging method was used to discretize the random field. Second-order perturbation FEM equations were given. Numerical results reveal that the proposed approaches are accurate and effective for structural analysis of solid propellant grain with random Poisson's ratio. |
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| Keywords: | Propellant grain Viscoelasticity Incompressibility Finite element method Poisson ratio Structural analysis |
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