| 基于粘弹性随机有限元的固体推进剂药柱可靠性分析 |
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| 引用本文： | 张海联,周建平.基于粘弹性随机有限元的固体推进剂药柱可靠性分析[J].固体火箭技术,2003,26(3):21-24. |
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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,长沙,410073 |
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| 基金项目： | 国家杰出青年基金(19925209) |
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| 摘 要： | 固体推进剂是一种颗粒填充复合材料，其性能参数具有一定的分散性。为了讨论各类随机因素对药柱结构可靠性的影响，采用局部平均法离散参数随机场，并通过相关结构分解成归一化的独立随机变量，将可靠度指标算法和粘弹性随机有限元法相结合，进行了固体推进剂药柱的结构可靠性分析。算例表明，精度较高，收敛速度较快，适用于工程计算。
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| 关 键 词： | 固体推进剂药柱 可靠性分析 粘弹性随机有限元 瞬时可靠度 压力曲线 |
| 文章编号： | 1006-2793(2003)03-0021-04 |
| 修稿时间： | 2001年8月29日 |
Reliability analysis of solid propellant grain based on viscoelastic stochastic finite element method |
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| ZHANG Hai-lian,ZHOU Jian-ping//School of Aerospace and Material Engineering,National Univ. of Defense Technology,Changsha ,China..Reliability analysis of solid propellant grain based on viscoelastic stochastic finite element method[J].Journal of Solid Rocket Technology,2003,26(3):21-24. |
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| Authors: | ZHANG Hai-lian ZHOU Jian-ping//School of Aerospace and Material Engineering National Univ of Defense Technology Changsha China |
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| Institution: | ZHANG Hai-lian,ZHOU Jian-ping//School of Aerospace and Material Engineering,National Univ. of Defense Technology,Changsha 410073,China. |
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| Abstract: | The randomness of parameters is bound to occur for solid propellant, because it is a type of particles-filled composite. The local averaging method is used to discretize the random field, correlated random variables are transformed to a set of uncorrelated normalized random variables, combining viscoelastic stochastic finite element method with H-L algorithm, the reliability of solid propellant grain is studied with different random parameters. Numerical results show that the methods can improve both accuracy and convergence , it is suitable for engineering calculation. |
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| Keywords: | solid propellant grain viscoelasticity randomness finite element method structural reliability |
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