Approach for a fast computation of induced magnetic field created by naval vessels

Article type: Research Article

Authors: Zhou, Guohua^a | Liu, Shengdao^{a; *} | Xiao, Changhan^a | Liu, Daming^a

Affiliations: [a] College of Electrical Engineering, Naval University of Engineering, Wuhan, Hubei, China

Correspondence: [*] Corresponding author: Shengdao Liu, College of Electrical Engineering, Naval University of Engineering, 717 Jiefang Road, Wuhan 430033, Hubei, China. E-mail: 18986151073@189.cn

Abstract: Integral equation method is widely used in magnetic field modeling of ships, but its nonsymmetric and dense coefficient matrix results in low computation efficiency and large memory, which limits its application in large scale problems. An approach for a fast computation of induced magnetic field created by ships was presented based on multiple layers fast multipole method and vector integral equation method. The numerical implementation of the proposed approach was described in detail. It is shown by an analytical sphere example and a simplified mock-up experiment that the proposed approach can reduce computation time and memory cost in induced magnetic field modeling of ferromagnetic objects.

Keywords: Vector integral equation method, fast multipole method, induced magnetic field, magnetic silencing

DOI: 10.3233/JAE-140113

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 47, no. 3, pp. 753-765, 2015