Open AccessThe 3D Modeling of GATEM in Fractured Random Media Based on FDTD
Author(s) -
Qiong Wu,
Yuehan Zhang,
Shanshan Guan,
Dongsheng Li,
Yanju Ji
Publication year - 2021
Publication title -
applied computational electromagnetics society journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.216
H-Index - 29
eISSN - 1943-5711
pISSN - 1054-4887
DOI - 10.13052/2021.aces.j.361102
Subject(s) - finite difference time domain method , domain (mathematical analysis) , diffusion , homogeneous , computer science , physics , mathematical analysis , mathematics , statistical physics , optics , thermodynamics
Grounded-source airborne time-domain electromagnetic (GATEM) method is an effective detection method of geological survey. The real geological media are rough, self-similar characteristics, and the diffusion process is anomalous diffusion. This paper primarily considers the GATEM responses of a grounded wire source in random media. Von Kármán function is used to establish three-dimensional (3D) random media model and the GATEM responses are realized based on 3D finite-difference time-domain (FDTD) method. The method is verified by homogeneous half-space model. The electromagnetic responses of random abnormal body model are analyzed, and the results show that the abnormal body can be clearly identified. The electromagnetic responses of a fractured model are analyzed, and the results show that the tilt angle of the fault can be reflected.