A novel magnetic testing method for the loss of metallic cross-sectional area of bridge cables

Issue title: Selected Papers from the 15th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2011)

Article type: Research Article

Authors: Wu, Xinjun^{a; *} | Yuan, Jianming^a | Ben, Anran^a

Affiliations: [a] School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China

Correspondence: [*] Corresponding author: Xinjun Wu, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China. Tel./Fax: +86 27 87559332; E-mail: xinjunwu@mail.hust.edu.cn

Abstract: It is important to inspect bridge cables to insure the safety of the bridge, especially to test its loss of metallic cross-sectional area (LMA). A novel magnetic testing method for the LMA that the magnetic energy directly imposes on the bridge cable is proposed, which has advantages over the magnetic flux measurement used by traditional main-flux and return-flux methods. Its equivalent magnetic circuit is obtained, too. Furthermore, according to the magnetic Kirchhoff's Law and Taylor expansion series, the theoretic model is obtained by ignoring the higher order and used to analyse the proposed magnetic testing method. Finally, it is verified experimentally and shown good resolution.

Keywords: Magnetic testing, bridge cable, loss of metallic cross-sectional area

DOI: 10.3233/JAE-2012-1461

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 39, no. 1-4, pp. 195-201, 2012