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Modal analysis method based on finite element modeling of airborne active phased-array antenna

A phased array antenna, modal analysis technology, applied in special data processing applications, instruments, electrical digital data processing and other directions, can solve problems such as high data cost and impracticality

Inactive Publication Date: 2012-09-12
XIDIAN UNIV
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Problems solved by technology

It is not practical if the cost of accumulating data based on experience is too high

Method used

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  • Modal analysis method based on finite element modeling of airborne active phased-array antenna
  • Modal analysis method based on finite element modeling of airborne active phased-array antenna
  • Modal analysis method based on finite element modeling of airborne active phased-array antenna

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Embodiment Construction

[0034] Such as figure 1 As shown, the static analysis method based on finite element modeling of airborne active phased array antenna includes the following steps:

[0035] 1) Determine the geometric model file of the airborne active phased array antenna according to the structural parameters of the airborne active phased array antenna, and input the geometric model file parameters into Ansys; and obtain the airborne active phase in the Ansys file The geometric model of the array antenna, the geometric model of the airborne active phased array antenna is shown in the figure figure 2 Shown. Among them, the geometric structure parameters of the airborne active phased array antenna include the parameters of the cold plate, the radiating plate, the T / R component and the cover;

[0036] 2) Set the material attribute data of the airborne active phased array antenna in the Ansys geometric model file; among them, the material attribute data of the airborne active phased array antenna incl...

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Abstract

The invention discloses a modal analysis method based on finite element modeling of an airborne active phased-array antenna. The method comprises the following steps: 1) according to structural parameters of the airborne active phased-array antenna, determining a geometric model file, and inputting parameters of the geometric model file into Ansys; 2) setting antenna material attribute data in the Ansys file; 3) setting unit type and size of a geometric model of the antenna; 4) automatically dispersing the geometric model of the antenna into multiple units, and dividing finite elements by adopting Ansys free grids; 5) giving constraint conditions of a finite element model of the antenna and determining a modal order to be extended of the finite element model; 6) computing natural frequency of each order of the finite element model of the antenna, and drawing mode of vibration and displacement cloud picture of each order of the finite element model of the antenna; 7) constructing an APDL (Ansys Parameter Design Language) macro document; and 8) directly generating the finite element model of the antenna. According to the method, a large amount of data cannot be required, and the method has the advantages of short modal analysis time, low cost and simple operation.

Description

Technical field [0001] The invention relates to a phased array antenna in radar technology, in particular to a modal analysis method based on finite element modeling of an airborne active phased array antenna. Background technique [0002] Active Phased Array Antenna (APAA) technology is a new technology that is being developed in recent years. It has more impact on the development of radar than any cutting-edge single pulse, pulse Doppler and other technologies. Be deep and extensive. The active phased array antenna is an antenna that changes the shape of the pattern by controlling the feed phase of the radiating element in the array antenna. Controlling the phase can change the direction of the maximum value of the antenna pattern to achieve the purpose of beam scanning. In special cases, you can also control the sidelobe level, the minimum position and the shape of the entire pattern, such as obtaining a cosecant square pattern and adaptively controlling the pattern. When r...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 王从思李兆王艳
Owner XIDIAN UNIV
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