摘要
给出了广义特征方程的随机有限元公式系统,建立了轴对称加劲壳屈曲分析的特征矩阵,在综合考虑各设计变量不确定性和随机均匀初始缺陷情况下,结合PEPM 法得到了屈曲临界载荷的随机特征值,并进行了可靠性分析.
The stochastic finite element formulation of the generalized eigenvalueproblem is presented in this paper.The characteristic matrices of bucklinganalysis for ring-stiffened axisymmetric shells are also established.By syn-thesizing the uncertainties of design variables and random uniform imperfection,the PEPM method is introduced to evaluate the statistical characteristicvalues of the buckling load.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
1991年第4期18-27,共10页
Journal of Shanghai Jiaotong University
关键词
壳体
屈曲
随机有限元法
环肋
加劲
stochastic finite element method
characteristic matrices
uncertainties
reliability
