一种复合材料壳体可靠性优化设计方法的实践  

Application of a reliability optimization design method for composite cases

作　　者：陈顺祥[1] 郝志明[1] 阳建红[1] 

机构地区：[1]第二炮兵工程学院,西安710025

出　　处：《固体火箭技术》2005年第1期65-67,71,共4页Journal of Solid Rocket Technology

摘　　要：将Neumann级数展开式用于Monte Carlo随机有限元法,对纤维缠绕壳体的结构可靠性进行了分析,并利用结构可靠性分析的Monte Carlo直接比较方法和复合材料力学的Tsai Hill失效判据给出了该结构的可靠性算式。在Monte Carlo抽样中列入了β球法加以改进,建立了此类结构的可靠性优化设计迭代式。算例证明,该可靠性优化设计方法可大大提高计算效率。The Neumann series expansion was used for the Monte-Carlo stochastic finite element method, the structure reliability of the fiber-wound case was analyzed, and the structure reliability calculation formula was developed by means of the Monte-Carlo comparison method of the structure reliability analysis and the T-sai-Hill failure criterion for mechanics of composite materials. β-ball method was adopted in the Monte-Carlo sampling, the iteration formula of reliability optimization design for the type of structure was established. The example shows that the calculation efficiency increases greatly by using this reliability optimization design method.

关 键 词：优化设计方法 复合材料壳体 Neumann 结构可靠性分析 Carlo抽样 可靠性优化设计 纤维缠绕壳体 随机有限元法 复合材料力学 级数展开式 失效判据 比较方法 计算效率 迭代式 类结构 

分 类 号：V435.1[航空宇航科学与技术—航空宇航推进理论与工程] TS254.3[轻工技术与工程—水产品加工及贮藏工程]