English

应用科学学报 ›› 1997, Vol. 15 ›› Issue (2): 198-204.

• 论文 • 上一篇    下一篇

远场涡流三维缺损响应的仿真研究

赵阳, 陈美娟, 曲民兴   

  1. 南京航空航天大学
  • 收稿日期:1995-08-06 修回日期:1995-11-05 出版日期:1997-06-30 发布日期:1997-06-30
  • 作者简介:赵阳:博士后,东南大学毫米波国家重点实脸室,南京 210096
  • 基金资助:
    国家自然科学基金

SIMULATION RESEARCH OF 3D DEFECT RESPONSE FOR REMOTE FIELD EDDY CURRENT NONDESTRUCTIVE TEST

ZHAO YANG, CHEN MEIJUAN, QU MINGXING   

  1. Nanjing University of Aeronautics & Astronautics, Nanjing 210096
  • Received:1995-08-06 Revised:1995-11-05 Online:1997-06-30 Published:1997-06-30

PDF

54

被引次数

9

摘要： 应用有限元方法,采用A,V-As-ψ位函数计算并结合三维场数值计算中的子结构-波阵法,给出了一种能在微机上对远场涡流的三维缺损响应进行仿真的方法,同时重点研究了相同体积的周向和轴向缺损响应信号及管中涡流分布.研究结果表明,轴向缺损引起的涡流畸变小于周向缺损时的变化,故周向缺损响应信号大于轴向缺损的响应信号.

关键词: 缺损响应, 无损检测, 远场涡流, 有限元

Abstract: The remote field eddy current (RFEC) technique is a new type of inspection technique for pipelines inspection which is not influenced by skin effect. However, up to date, the physics research of RFEC has not been finished thoroughly and some phenomena are still unsolved and unexplained. In this paper the A,V-As-ψ model and substructure-front technique are presented in FEM,and the simulating method on microcomputer ic also given for 3D RFEC defect response analysis. The obtained results show that,since the change of eddy current distribution surrounding the circumferential defect is more stronger than that of axial defect, the signal of circumferential defect response is therefore stronger than that of axial defect.

Key words: finite-element, remote field eddy current, defect response, nondestructive test