Induced Fields Produced on Iron Rotation Long Ellipsoid Cavity under Uniform Constant Magnetic Field
PENG Huaiyun① WANG Yuanxin② PAN Weiyan② GUO Lixin① ZHANG Hongqi② CHEN Yu②
①(School of Science, Xidian University, Xi’an 710071, China) ②(National Key Laboratory of Electromagnetic Environment, Research Institute of Radio Wave Propagation, Qingdao 266107, China)
The shape of the submarine is idealized as a rotation symmetrical long ellipsoid cavity in order to study the induced fields around the submarine. The expressions of the induced magnetic fields in inside and outside cavity are derived. The contour distributions of the total induced magnetic field and each component on the cavity along different latitudes, different location directions and different detection heights are analyzed and discussed by the analytical method under the uniform constant magnetic field. The calculation results indicate that the induced magnetic fields will gradually die down along with the increase of the propagation distance. The induced magnetic field is prominent along the cavity longitudinal direction (z component), while it is minimum along the cavity vertical direction (x component). The total induced magnetic field and each component detected by the magnetometer at middle latitude can be more easily detected than those at high latitude. While their detection ranges change very little along with the increase of the height. It can be more easily detected when the cavity is placed along the south and north direction.
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PENG Huaiyun, WANG Yuanxin, PAN Weiyan, GUO Lixin, ZHANG Hongqi, CHEN Yu. Induced Fields Produced on Iron Rotation Long Ellipsoid Cavity under Uniform Constant Magnetic Field. JEIT, 2017, 39(5): 1250-1255.
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