基于EFGM-ANN的含多裂纹结构的断裂可靠性分析  

CRACK RELIABILITY ANALYSIS OF MULTI-CRACK STRUCTURE BASED ON EFGM-ANN METHOD

作　　者：孟广伟[1] 周立明[1] 赵云亮[1] 沙丽荣[1] 李锋[1] 

机构地区：[1]吉林大学机械科学与工程学院,长春130022

出　　处：《机械强度》2010年第6期1012-1017,共6页Journal of Mechanical Strength

基　　金：教育部博士点基金(20060183063);吉林大学"985工程";吉林省科技厅基金(20090540)资助项目~~

摘　　要：基于无网格伽辽金法(element-free Galerkin methods,EFGM)和人工神经网络(artificial neural network,ANN)理论,提出用EFGM-ANN方法进行可靠性分析。采用无网格伽辽金法计算含裂纹结构的应力强度因子,通过使用带权正交函数作为基函数,提高计算效率;又将影响结构断裂的不确定因素视为随机变量,通过径向基(radial basis function,RBF)神经网络响应面法模拟结构的极限状态函数及其导函数,对含多裂纹结构进行断裂可靠性分析。计算结果表明本方法具有广泛的应用前景。An EFGM-ANN(element-free Galerkin methods artificial neural network) method was proposed to perform reliability analysis,which based on the element-free Galerkin method and artificial neural network theory.The element-free Galerkin method was adopted to calculate the stress intensity factor of the structure with multi-crack,the weighted orthogonal function was taken as the basis function,which lead to higher computational efficiency.The uncertainties which affect the structural fracture was taken as random ...

关 键 词：无网格伽辽金法 正交基函数 人工神经网络 可靠性 多裂纹 

分 类 号：TB115[理学—数学]