摘要
对涡流无损检测中的类Ｓｏｍ ｍｅｒｆｅｌｄ 积分给出了一种简单有效的数值积分方法．为了加速积分的收敛，导出了一个渐近项，将被积函数减去这个渐近项，从而得到了快速收敛的积分，加速了无穷积分的截断，显著提高了类Ｓｏｍ ｍｅｒｆｅｌｄ 积分的计算效率．将几组典型数据的计算结果与ＦＥＭＢＥＭ 组合法计算结果的比较表明，该方法是准确和快速的．这一积分方法的高效率使其可以应用于涡流无损检测中缺陷的重构．
Presented is a method for integrating Sommerfeld like integrands in eddy current non destructive detection along the real axis. Subtraction of asymptotic terms is proposed to speed up the truncation process of an infinite integration interval. Several different cases are calculated. The present method is more accurate than the finite element and boundary element method. In addition, it can be used to reconstruct flaws in eddy current non destructive detection.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
1999年第10期23-26,31,共5页
Journal of Xi'an Jiaotong University
基金
中日无损评估中心资助
关键词
Sommerfeld积分
电磁场
涡流
无损检测
数值积分
Sommerfeld like integrals
numerical methods in electromagnetic fields
eddy current non destrctive detection
