二维弹性构件缺陷识别的边界元逆分析法

Flaw Identification in 2-d Elastic Structural Component by Means of Inverse Analysis of Boundary Element Method

利用逆分析法对二维弹性构件中未知位置及大小的缺陷的识别作了研究。在缺陷识别中，给出了如结构体一些内部点的应力或应变等补充信息，利用边界元与非线性优化技术相结合，确定了二维弹性体的内部缺陷，分析了典型缺陷，如圆孔形及椭圆形的情况。算例分析结果证明了此方法的有效性。

Inverse analysis is presented for the identification of the location and size of intemal flaws in two-dimensional structures. In this problem, additional information such as stress or strain is provided at several interanl points in the structure, the unknown naw is determined by using the boundary element method coupled with optimization technique. Typical flaws, for example,Circular and ellipse, are studied in this paper, some numerical examples are given to demonstrate the usefulness of the prosed method.