Ship electromagnetic scattering prediction method and system based on sub-domain modeling
An electromagnetic scattering and electromagnetic technology, which is applied in the field of ship electromagnetic scattering prediction based on sub-domain modeling, achieves the effects of high calculation efficiency, improved accuracy and reliability
Active Publication Date: 2015-01-28
CHINA SHIP DEV & DESIGN CENT
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[0004] Retrieving domestic and foreign literature, the accurate prediction method of ship electromagnetic scattering based on domain division simulation modeling is still blank, the present invention provides a kind of ship electromagnetic scattering prediction method based on domain division modeling
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[0036] 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.
[0037] The present invention is based on the idea of "sub-domain modeling", and the solution of the whole problem is attributed to the vector superposition of scattering fields in different regions. fully function under the applicable conditions. The invention can improve the accuracy and reliability of the prediction of the ship's electromagnetic scattering characteristics.
[0038] In the embodiment of the present invention, the method for predicting ship electromagnetic scattering based on sub-domain modeling, such as figure 1 shown, including the following steps:
[0039] S1. For the fine ...
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The invention discloses a ship electromagnetic scattering prediction method and system based on sub-domain modeling. The method comprises the following steps: carrying out first region electromagnetic modeling to a fine structure scattering region of a ship by adopting a finite difference time domain method; for a big-scale conductor scattering region of the ship, carrying out second region electromagnetic modeling by adopting a time-domain physical-optic method; establishing a cross-coupling scattering correlation model among a multi-scale structure on the basis of a Kirchhoff surface integral through the equivalent source dispersing of a region boundary surface scattered field; and dispersing a pulse response interval to generate a uniform response sampling time sequence, and adopting a sequential transferring method to directly convert a secondary incident field value to a second region by a first region into time domain scattering waveform in a weighting way by taking each time step of time domain finite difference calculation as a uniform reference. The accuracy and reliability of ship electromagnetic scattering prediction can be improved through a classification modeling method.
Description
technical field [0001] The invention belongs to the field of target radar wave stealth design, and in particular relates to a ship electromagnetic scattering prediction method and system based on subdomain modeling, which can be applied to quantitative control of RCS indicators of large-scale complex targets such as ships and optimal design of radar wave stealth . Background technique [0002] The ship target is a platform composed of multi-scale structures, which not only exhibits macroscopic superelectric large wavelength size and relatively regular conductor structure characteristics, but also has complex local fine structure and material characteristics. When it is illuminated by detection radar waves, its scattered echoes are composed of multi-scale scattered echoes, which brings great difficulties to the identification of strong scattering sources and the prediction of RCS indicators in the overall stealth design. [0003] The accuracy of target electromagnetic scatte...
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Inventor 吴楠陈亮彭刚程洪郑生全
Owner CHINA SHIP DEV & DESIGN CENT