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Airplane radome with PMI foam sandwich structure and design method and manufacturing method of airplane radome

A technology of a sandwich structure and a manufacturing method, which is applied in the field of aircraft radome products and their design and manufacture, can solve the problems that the thickness of the foam cannot meet the optimum thickness, the molding and processing of the foam sandwich is difficult, and the regional difference of wave transmittance is large, and the Improve the effect of poor wave transmission performance, light weight and good rigidity

Inactive Publication Date: 2019-01-04
SICHUAN TIANYUAN MACHINERY CO LTD OF 081 ELECTRONICS GRP
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AI Technical Summary

Problems solved by technology

The method includes the use of vacuum bag / oven or vacuum bag / autoclave forming technology, and the use of a whole piece of PMI foam flat plate to thermoform the concave radome. The thickness cannot meet the optimal thickness corresponding to different incident angles, and the area of ​​wave transmittance varies greatly

Method used

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  • Airplane radome with PMI foam sandwich structure and design method and manufacturing method of airplane radome
  • Airplane radome with PMI foam sandwich structure and design method and manufacturing method of airplane radome
  • Airplane radome with PMI foam sandwich structure and design method and manufacturing method of airplane radome

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Embodiment Construction

[0028] Such as Figure 1 to Figure 4 Shown is an embodiment of the present invention.

[0029] A kind of aircraft radome design method of PMI foam sandwich structure, comprises the steps:

[0030] 1) According to the relative positional relationship between the radar antenna 1 and the radome 2, calculate and count the incident angle distribution of the electromagnetic waves irradiated on different positions of the radome 2;

[0031] 2) According to the frequency specified by the radome 2, the dielectric parameters of the skin material and the interlayer material are brought in, and the thickness of the sandwich structure wall thickness for different electromagnetic wave incident angles satisfying the best transmission efficiency is calculated and counted, and the corresponding change curve is constructed;

[0032] 3) According to the results of step 1) and step 2) and the gradient change of the incident angle at different points of the radome 2, divide the upper, middle and l...

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Abstract

The invention provides an airplane radome with a PMI foam sandwich structure and a design method and a manufacturing method of the airplane radome. By calculation of the incident angle of the radome,different regions are divided, the thickness of the corresponding optimal sandwich layer is designed, and PMI foams with different thicknesses are used in the different regions. By the design of the variable-thickness sandwich structure, the airplane radome has the advantage of high transmission efficiency, and an electric property required for design can be met completely. In the manufacturing method, the radome is formed by PMI foam blocks with different thicknesses, the sandwich layer are integrally formed after the blocks are assembled, by the variable-thickness sandwich layer, the requirement for the electric property of the radome is met to a maximum extent, the processing cost is reduced, the processing time is saved, and the problem that the transmission efficiency of the equal-thickness radome becomes poor due to change of an angle of incidence is solved.

Description

technical field [0001] The invention relates to an aircraft radome product and a design and manufacturing method thereof, in particular to a radome product with a PMI foam sandwich structure and a design and manufacturing method thereof. Background technique [0002] The structures commonly used in aircraft radomes include half-wave wall structure, single-layer thin-wall structure, and honeycomb sandwich structure. The half-wave wall structure is often heavy because of its large thickness and density; the single-layer thin-wall structure has poor rigidity and is easy to deform; the honeycomb interlayer is usually of the same thickness as the honeycomb core layer, and the electromagnetic wave is transmitted when the incident angle changes greatly. Efficiency gets worse. [0003] Chinese patent CN105922703B discloses a method for preparing a thin-walled foam sandwich structure composite radome. The foam layer is processed by a whole piece of foam, which is extremely wasteful...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/30B29C70/54G06F17/50B29L31/30
CPCB29C70/30B29C70/545B29L2031/3076G06F30/15
Inventor 罗小敏易洪林赵晓东林静刘川宇
Owner SICHUAN TIANYUAN MACHINERY CO LTD OF 081 ELECTRONICS GRP
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