A Calculation Method of Thermo-solid Coupled Field of Reflector Antenna

Abstract

The invention discloses a thermosolid coupling field calculation method of a reflector antenna, relates to the technical field of reflector antenna analysis, and aims to provide a high-precision, simple and practical calculation method. The calculation method of the present invention mainly includes the following process: establish the antenna finite element model in FEA software and determine the maximum physical size, calculate the temperature gradient distribution in three directions; apply the temperature gradient distribution to the finite element model, and give material characteristic parameters , establish the analysis condition, and obtain the solid field result of the reflector antenna through the statics solution; carry out the best fitting processing on the deformation data of the reflector to obtain the surface accuracy of the three temperature gradients, and finally perform the accuracy synthesis to obtain the total surface of the antenna precision. The invention effectively integrates the analysis of thermal and solid fields, and is especially suitable for the design, index budget and checking of various reflector antennas.

Description

technical field [0001] The present invention relates to the technical field of reflector antenna analysis, in particular to a method for calculating a thermosolid coupling field of reflector antennas, which can be used for coupling calculations of temperature fields and solid fields of single reflector antennas or double reflector antennas, and is especially suitable for Index budget and performance analysis of reflector antennas. Background technique [0002] Reflector antennas are widely used in the fields of communication, measurement and control, and radio astronomy because of their strong directivity. For reflector antennas, especially reflector antennas that work in high frequency bands, in the process of design and demonstration, it is necessary to accurately estimate its various technical indicators. Among them, the most critical is the influence of temperature on the surface accuracy of the antenna and its comprehensive electrical performance. [0003] During opera...

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Problems solved by technology

This method is only some preliminary performance estimation. For large-scale and high-precision reflector antennas, this method will cause very large errors in calculation results and cannot truly reflect the thermo-solid coupling problem. It has the following defects:

For reflector antennas with different calibers, different types, different geographical locations, and different materials that appear in the project, there is a lack of reference values

[0007] (2) The numerical simulation analysis given in the existing literature is too cumbersome, especially in order to reduce the amount of calculation, the model has been simplified a lot, and a lot has been done for the conduction, radiation and convection in the thermal analysis process. Assumptions, resulting in reduced credibility of calculation results

[0008] (3) Some literatures mention the use of temperature sensors to measure the antenna temperature, but this method is not operable in the design demonstration stage

Due to the many uncertainties in the modeling process and the influence of environmental factors, the error of the calculation results will increase.

[0012] (3) The method of determining the temperature field through measured data is not suitable for the design and development stage of the project

The structure composition and operating environment of the reflector antenna are complex, which limits the use of existing software processes

[0016] (3) The application background of the above methods and the reflector antenna belong to different fields, and the methods and processes cannot meet the performance analysis of the reflector antenna

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