摘要
利用信息熵等效转换原则,将模糊变量转变为随机变量,并给出了模糊结构弹塑性分析的一阶摄动有限元递归列式,推导了含不确定性材料参数的结构刚度矩阵对随机变量的偏导表达式以及对位移向量求导的近似计算式。采用增量理论结合弹塑性分析的摄动递归列式编制了有限元计算程序,并对具有模糊材料参数的板壳结构进行分析。
The equivalent conversion of information entropy is carried out to convert fuzzy variables to random variable s. Based on this method, the recursion expression of elastic-plastic finite ele ment analysis for fuzzy structure is analytically derived, the expressions for t he partial derivatives of stiffness matrix with respect to non-dimension to the se formations forwarded, an elastic-plastic finite element computing procedure on the basis of increment theory developed,and the board shell structure with fu zzy material parameter analyzed.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2003年第3期26-29,共4页
China Railway Science
关键词
模糊结构
信息熵
弹塑性分析
有限元法
Fuzzy structure
Information entropy
Elast ic-plastic analysis
Finite element method
