Modeling the Magnetic Field Distribution for Pipe Corrosion Pit with ANSYS Software

The Metal Magnetic Memory (MMM) Method, as an advanced pipeline non-contact and trenchless online inspection technology, is being used increasingly. But how to determine the characteristics of pipe defects from a detected magnetic field signal is still an unsolved problem. Here, the authors propose a new analysis method for this problem by calculating the magnetic field distribution signal of a corrosion pit in buried metal pipe with ANSYS® software. The main steps of this method can be summarized as: solving the stress concentration for corrosion pit with ANSYS® Mechanical module firstly, then coupling the contribution of stress with magnetic permeability by a user ANSYS® APDL subroutine, and finally, calculating the magnetic field signal of the pit in earth magnetic field with ANSYS® Emag module. Five different corrosion pit positions are calculated and discussed. The results show that this method can model a corrosion pit magnetic field signal successfully. This method can be potentially used to analyze magnetic field signals of other more complex cases, such as influences of pit size and depth and combination effects of pits.

• Record URL:
  https://doi.org/10.1061/41202(423)114
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784412022
• Supplemental Notes:
  • Copyright © 2011 ASCE
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Bi, Wuxi
  • Wang, Weibin
  • Zhao, Choumin
  • Xue, Zhiyuan
  • Lin, Song
  • Gao, Shanbu
• Conference:
  • International Conference on Pipelines and Trenchless Technology 2011
  • Location: Beijing , China
  • Date: 2011-10-26 to 2011-10-29
• Publication Date: 2011

Language

• English

Media Info

• Media Type: Digital/other
• Features: References;
• Pagination: pp 1073-1080
• Monograph Title: ICPTT 2011: Sustainable Solutions For Water, Sewer, Gas, And Oil Pipelines

Subject/Index Terms

• TRT Terms: Corrosion; Defects; Electromagnetic fields; Permeability; Pipelines; Trenchless technology
• Identifier Terms: ANSYS (Computer program)
• Subject Areas: Maintenance and Preservation; Pipelines; I60: Maintenance;

Filing Info

• Accession Number: 01469694
• Record Type: Publication
• ISBN: 9780784412022
• Files: TRIS, ASCE
• Created Date: Jan 17 2013 1:48PM