Dynamic Simulation of Magnetic Flux Leakage Field of Columniform Surface Corrosion Defect Based on 3D Finite Element Analysis
-
摘要: 根据电磁场有限元分析的基础理论，对储罐底板圆柱形表面腐蚀缺陷，应用ANSYS三维有限元静态分析了圆柱形表面腐蚀缺陷漏磁场，得到了圆柱形表面腐蚀缺陷漏磁场的空间分布。在一定条件下，静态模拟的缺陷漏磁场受励磁结构中永磁铁磁场的影响较大，造成在永磁铁附近漏磁场分布的畸变。而动态模拟下得到的漏磁场只在缺陷附近有明显的变化，缺陷漏磁场受励磁结构中永磁铁磁场的影响很小，有利于对腐蚀缺陷的分析。
-
关键词:
- 圆柱形体表面腐蚀缺陷 /
- 漏磁场 /
- 三维有限元分析 /
- 动态模拟
Abstract: For columniform surface corrosion defect of tank floor, according to the basic theory of electromagnetic field finite element analysis, magnetic flux leakage filed of columniform surface corrosion defect is analyzed statically, and the magnetic flux leakage filed spatial distribution of columniform surface corrosion defect is found by means of 3D finite element of ANSYS. In given condition the static simulated magnetic flux leakage field is heavily affected by the magnetic field of permanent magnet in magnetizing system, and the distortion of distribution of magnetic flux leakage field near permanent magnet is caused. The dynamic simulated magnetic flux leakage field changed visibly around the defect, which is hardly affected by the magnetic field of permanent magnet in magnetizing system. It is good for the analysis of corrosion defect. -
-
[1] 戴光，刘延雷，杨志军.基于有限元方法分析不同参量对裂纹漏磁场的影响[J].化工机械,2005(5):279. [2] 金建铭.电磁场有限元方法[M].西安：西安电子科技大学出版社,1998. [3] 唐兴伦，范群波，张朝晖，等. Ansys工程应用教程热与电磁学篇[M].北京：中国铁道出版社,2003. [4] 龚曙光.Ansys基础应用及范例解析[M].北京：机械工业出版社,2003. [5] 汪友生，张延华.漏磁信号的有限元分析与仿真[J].计算机仿真,2005,22(7):185-189. [6] 兵器工业无损检测人员技术资格鉴定考核委员会.常用钢材磁特性曲线速查手册[M].北京：机械工业出版社,2004. [7] Katragadda G, Si JT, Lord W, et al. A comparative study of 3D and axisymmetric magnetizer assemblies used in magnetic flux leakage inspection of pipeline[J]. IEEE Transaction on Magnetics,1996,32(3):1573-1576.
计量
- 文章访问数: 0
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
