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Prediction Method of Electrical Performance of Planar Array Antenna Under Shock Wave Loading

A planar array antenna and prediction method technology, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as inability to accurately predict changes in antenna electrical performance

Active Publication Date: 2019-04-23
JIANGSU LIANHAI COMM
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Problems solved by technology

The specific analysis results are in "Ren Xiumin. Research on the damage effect of typical phased array antennas under the action of shock waves. Beijing Institute of Technology Master's Degree Thesis, 2015." However, the article only cares about the maximum deformation of the antenna panel during the impact load process, not the load action Afterwards, the antenna is plastically deformed, so it is impossible to accurately predict the electrical performance changes of the antenna after the shock wave load

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  • Prediction Method of Electrical Performance of Planar Array Antenna Under Shock Wave Loading
  • Prediction Method of Electrical Performance of Planar Array Antenna Under Shock Wave Loading
  • Prediction Method of Electrical Performance of Planar Array Antenna Under Shock Wave Loading

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Embodiment Construction

[0058] Specific embodiments of the present invention will be described in detail below.

[0059] refer to figure 1 , a method for predicting the electrical performance of a planar array antenna under a shock wave load, including the following steps:

[0060] (1) Establish a finite element model according to the structural parameters and material properties of the planar array antenna;

[0061] (2) Extract the node coordinate r of each antenna element on the antenna radiation front n , r n The expression is:

[0062] r n =(x n ,y n ,z n )

[0063] Wherein, n={1,2,...,N}, N is the total number of antenna elements;

[0064] x n is the node abscissa of the nth antenna element;

[0065] the y n is the node ordinate of the nth antenna element;

[0066] z n is the node normal coordinate of the nth antenna element;

[0067] (3) Define the elastic-plastic properties of the planar array antenna material, that is, define the stress-strain curve of the material;

[0068] (...

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Abstract

The invention relates to an electrical performance prediction method of a planar array antenna under shock wave load, including: (1) establishing a finite element mode according to the structural parameters and material properties of the planar array antenna; (2) extracting the node coordinates rn of each antenna element on the antenna radiation front; (3) defining the elasto-plastic properties of the planar array antenna; (4) loading the position constraint to the finite element model; (5) calculating the overpressure [Delta]p of the explosion shock and defining the load time history curve; (6) transforming the load time history curve into the impact load F(t) and applying the load to the finite element model, and obtaining the structural dynamic equation under the impact load; (7) solving the kinetic equation to obtain the plastic deformation of the antenna radiation surface under the shock wave load of the planar array antenna, and deriving the node position offset [Delta]rn of the front antenna element; (8) obtaining the relation of effect of the antenna plastic deformation on the far field pattern under the shock wave load.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a method for predicting the electrical performance of a planar array antenna under the action of a shock wave load, which can provide reference for the explosion-proof design of the planar array antenna structure. Background technique [0002] With the rapid development of science and technology, military electronic reconnaissance technology and equipment have developed significantly. Judging from decades of development, there has always been a struggle between radar and anti-radar. As an electromagnetic sensor system of electronic equipment, radar antenna has become an indispensable and important component of radar systems such as communication, navigation, and detection. If the radar antenna is damaged, the entire radar system will fail, so the radar antenna has become a direct target or an important target of the missile. When the missile directly attacks the radar antenna,...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 宋立伟张超洪涛韩创王伟周金柱李娜
Owner JIANGSU LIANHAI COMM
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