| 固体推进剂药柱松弛模量随机粘弹性有限元分析 |
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| 引用本文： | 张海联,周建平.固体推进剂药柱松弛模量随机粘弹性有限元分析[J].推进技术,2001,22(4):332-336. |
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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： | 为了研究性能参数的分布对药柱结构完整性的影响，以不可压缩粘弹增量有限元和摄动法为基础，采用局部平均方法对随机场进行离散，发展了一种松弛模量随机粘弹有限元方法，讨论了模量的随机性对结构分析的影响。对药柱进行随机模拟，程序实施简单，计算效率和精度较高。
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| 关 键 词： | 固体推进剂 推进剂药柱 结构分析 固体火箭发动机 松弛模量随机粘弹性有限元方法 随机模拟 随机场 离散 局部平均方法 |
| 文章编号： | 1001-4055(2001)04-0332-05 |
| 修稿时间： | 2000年11月3日 |
Viscoelastic stochastic finite element simulation of solid propellant grain with random relaxation modulus |
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| Zhang HaiLian and Zhou JianPing.Viscoelastic stochastic finite element simulation of solid propellant grain with random relaxation modulus[J].Journal of Propulsion Technology,2001,22(4):332-336. |
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| Authors: | Zhang HaiLian and Zhou JianPing |
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| Institution: | 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: | The randomness of parameters must be accounted for in structural analysis of solid rocket motor grain. Basing on perturbation method and incremental FEM suitable for incompressible materials, a new type of viscoelastic stochastic finite element method is investigated. The local averaging method is used to discretize the random field. The influence of random relaxation modulus is discussed. Numerical results reveal that the proposed approaches have the advantages of the simple and convenient program implementation, and are accurate and effective for the structural analysis of solid rocket motor grain with random relaxation modulus. |
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| Keywords: | Solid propellant Propellant grain Viscoelasticity Finite element method Random variable Elastic modulus Structural analysis |
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