摘要
本文对涡流检测中解析求解轴对称场时遇到的无穷积分给出一种简单有效的数值积分方法 ,提出一种改进积分收敛性的方法 ,加速了无穷积分的截断 ,显著提高了轴对称场的计算效率。几组典型数据的计算结果与FEM BEM组合法计算结果的比较表明 ,本文的方法是准确、快速的 ,这一计算方法的高效率使其可应用于涡流无损检测中缺陷的重构。
A method of integrating infinite integrals which occur in axisymmetrical field in eddy current testing is presented. Subtraction of asymptotic terms is proposed to speed up the truncation process of an infinite integration interval, which greatly improves the integration of infinite integrals. Therefore, the method greatly improves the calculation of the axisymmetrical field. Several different cases are calculated by the method. Comparison with FEM BEM technique shows that the present method is accurate and very efficient. It can further be used to reconstruct flaws in eddy current non destructive detecting.
出处
《计量学报》
CSCD
北大核心
2000年第4期296-301,共6页
Acta Metrologica Sinica
基金
中日无损评估中心资助
关键词
涡流无损检测
轴对称场
无穷积分
金属材料
Eddy current non destructive detecting
Axisymmetrical field
Infinite integrals
