基于大应变黏弹性理论的药柱结构可靠性分析  

Structural Reliability of Solid Propellant Grain Based on Large Strain Viscoelastic Theory

作　　者：简斌[1] 常新龙[1] 张晓军[1] 

机构地区：[1]第二炮兵工程学院,陕西西安710025

出　　处：《上海航天》2011年第1期46-49,55,共5页Aerospace Shanghai

摘　　要：基于大应变黏弹性理论,用积分随机有限元方法计算结构功能函数的各阶中心矩,用Gram-Charlier级数拟合概率密度函数,再由数值积分得到药柱结构的可靠度。算例表明:基于大应变黏弹性理论的计算结果与实际情况吻合。Integral stochastic finite element method was applied to gain the every order moment of the structural function based on large stain viscoelastic theory in this paper.The probability density function was fitted through Gram-Charlier series.The numerical integrate was applied to obtain the structural reliability of solid propellant grain.The numerical computation results showed that the calculated result based on large stain viscoelastic theory was in accord with the fact.

关 键 词：药柱 黏弹性 随机有限元 八面体剪应变 可靠性 

分 类 号：V521[航空宇航科学与技术—人机与环境工程]