Equivalent magnetic moment based magnetic anomaly characteristic field characterization method for submersible platform
A characteristic field and platform technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of complex shape of the platform, uneven magnetization, large approximation error, etc.
Active Publication Date: 2014-02-05
CHINA SHIP DEV & DESIGN CENT
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There are many factors related to the magnetic anomaly characteristic field of the submarine platform, mainly including the induced magnetic field generated by the magnetization of the magnetic field source such as the geomagnetic field and the fixed magnetic field caused by the hysteresis effect. Because the theoretical modeling of the fixed magnetic field is directly related to the magnetization history of the target, and the platform The shape is relatively complex and the magnetization is uneven. Directly using the analytical method will produce a large approximation error, and it is impossible to accurately characterize the mechanism of the magnetic anomaly characteristic field
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[0047] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0048] Such as figure 1 As shown, the characterization method of the magnetic anomaly characteristic field of the submarine platform based on the equivalent magnetic moment is characterized by: (1) Numerical modeling of the magnetization field of the submarine platform under joint boundary conditions
[0049] Based on the finite element method, the platform structure and inhomogeneous medium are discretized, the volume V is divided into many small-volume tetrahedral units, an interpolation function is established, and the unknown function of each unit is approximately expressed; the extreme value v...
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The invention relates to the field of underwater platform stealth designs and discloses an equivalent magnetic moment based magnetic anomaly characteristic field characterization method for a submersible platform. The method comprises the following steps: 1, modeling magnetizing field values of the underwater platform under combined boundary conditions; 2, characterizing the magnetic anomaly characteristic field distribution of the submersible platform; 3, performing inverting on magnetic moment of the submersible platform based on the field characteristics; 4, performing simulation analysis on magnetic dipoles of the magnetic moment of the submersible platform; 5, characterizing the magnetic anomaly characteristic field of the submersible platform based on the magnetic field of the equivalent magnetic moment magnetic dipoles. According to the method, an equivalent magnetic moment inversion method based on the magnetic anomaly characteristic field is built, the complex magnetic anomaly characteristic field analysis problem comes down to the equivalent magnetic moment characterization problem, so that the problem that the analysis scale is limited caused by complex factors is solved. The method is suitable for the underwater submersible platform magnetic stealth design, and can also be used for magnetic bait simulation for magnetic anomaly resistance detection.
Description
technical field [0001] The invention relates to the field of underwater platform stealth design, in particular to a method for characterization of the magnetic anomaly characteristic field of a submarine platform based on an equivalent magnetic moment. Background technique [0002] With the development of electromagnetic reconnaissance technology, magnetic anomaly detection technology will become one of the main means of submarine reconnaissance. Its basic working principle is: ferromagnetic structures such as submersible platform shells, equipment, and cables are magnetized by the geomagnetic field to generate an additional static magnetic field, which distorts the distribution of the geomagnetic field and forms a magnetic field. Through passive non-contact measurement, from The characteristic information relative to the geomagnetic field is extracted from the spatial distribution curve of the magnetic anomaly characteristic field to realize the positioning and tracking of ...
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Inventor 吴楠王春宋文武李晶谢大刚潘涵
Owner CHINA SHIP DEV & DESIGN CENT