摘要
利用二阶矩法推导出圆柱壳和椭球壳基于弹性失效设计准则的中径公式的可靠度指标计算公式,并将其应用于某型号固体火箭发动机壳体的算例中。同时,利用Ansys软件建立该固体火箭发动机壳体有限元模型,在确定性有限元分析的基础上,对其进行随机有限元分析,求出结构的可靠度。分析表明,以材料的力学性能参数、壳体的几何参数为随机变量的固体火箭发动机壳体的可靠性设计是科学和必要的。最后,对输出的功能函数进行灵敏度分析,为结构参数的优化设计提供参考。
The intermediate diameter formula based on the elastic failure norm about reliability of cylindrical shells and ellipsoidal shells with internal pressure were conducted by using the second moment method and applied to a solid rocket motor vessel case.A finite element model of the solid rocket motor vessel was built by using Ansys software and the reliability of the vessel was calculated by random finite element method.The result shows that reliability design of solid rocket motor vessels based on regarding ...
出处
《机械强度》
CAS
CSCD
北大核心
2010年第6期1026-1030,共5页
Journal of Mechanical Strength
基金
内蒙古自治区高等学校科学研究项目(NJC07068)
关键词
固体火箭发动机壳体
随机有限元
可靠性
灵敏度
Solid rocket motor vessel
Random finite element method
Reliability
Sensitivity
