基于Neumann随机有限元法的复合材料压力容器的应力分析  

On Exploring Method of Stress Analysis of Composite Pressure Vessel Suitable for Estimating its Reliability

作　　者：雷开贵[1] 邓子辰[1] 陈顺祥[2] 

机构地区：[1]西北工业大学工程力学系,陕西西安710072 [2]第二炮兵工程学院,陕西西安710025

出　　处：《西北工业大学学报》2002年第3期363-367,共5页Journal of Northwestern Polytechnical University

基　　金：航空科学基金 (0 0 B5 30 0 6 );工业装备结构分析国家重点实验室开放基金

摘　　要：利用 Neumann级数展开的 Monte- Carlo随机有限元法 ,分析了纤维缠绕壳体在内压及材料工程常数随机变化作用下的应力响应 ,绘出了最大应力响应分布曲线 。Ordinary FEM(finite element method) stress analysis cannot satisfy the need of reliability estimation. So we use Neumann stochastic FEM to analyze stresses in composite pressure vessel under the action of random gas pressure. Section 2 considers gas pressure as a stochastic variable with normal distribution and takes into consideration the stochastic nature of loads, tensile strength and shearing strength. Section 3 discusses in detail how to use Neumann stochastic FEM to compute the stress response of composite pressure vessel under the action of random gas pressure; eqs.(7) through (16) are needed in such computation. Section 4 gives two numerical examples. Table 3 gives the possible maximum stresses and their possible locations for numerical example 1 and Table 4 gives such maximum stresses and locations for numerical example 2; possible maximum stresses and their possible locations are the prerequisites for reliability estimation.

关 键 词：压力容器 应力分析 纽曼级数 复合材料 随机有限元法 纤维缠绕壳体 

分 类 号：TH49[机械工程—机械制造及自动化] O344[理学—固体力学]