Fluid-solid coupling field calculation method of double-reflector antenna

Abstract

The invention discloses a fluid-solid coupling field calculation method of a double-reflector antenna, relates to the technical field of reflector antenna analysis, and aims to provide a calculation method which is high in precision, free of conversion errors and high in practicability. The method mainly comprises the following steps: establishing a model and a computational domain in fluid fieldpretreatment software, and obtaining an intermediate format file after conversion; importing the intermediate format file into fluid field software, determining a solver according to the Reynold number, and obtaining a fluid field result; performing data processing on the fluid field result to obtain a resistance coefficient, a lift coefficient and a moment coefficient of the antenna; converting the format of the fluid field result, then importing the fluid field result into solid field software, establishing a relation coupling unit in the solid field, and obtaining a solid field result. According to the method, fluid and solid field analysis is effectively integrated, and the method is particularly suitable for design, index budget and strength check of various reflector antennas.

Description

technical field [0001] The invention relates to the technical field of reflector antenna analysis, can be used for calculation methods of fluid fields and solid fields of double reflector antennas such as Cassegrain and Gregory, and is especially suitable for index budget and strength check of double 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. Due to the increased geometric parameters of the dual-reflector antenna, it is convenient to design more flexibly according to different requirements; a short-focus parabola can be used as the main reflector, which reduces the longitudinal size of the antenna; the secondary focus is closer to the receiving device, reducing transmission noise. Therefore, the double-reflector antenna occupies a very important position in the antenna field. [0003] During the operation of the antenna...

AI Technical Summary

Problems solved by technology

This method is only some preliminary performance estimation. For large-scale high-precision dual-reflector antennas, this method is too rough and cannot truly reflect the problem of fluid-structure coupling. It has the following defects:

As we all know, the flow field pressure is a vector value, and only scalar parameters are given in the textbook, which cannot reflect the direction of the force, which will lead to large deviations in the calculation results

[0007] (2) Antenna focal diameter ratio is single

[0008] (3) There is no antenna height value involved

[0009] (4) Lack of secondary reflector data

The data given in the textbook is only the main reflector of the antenna, and does not involve the wind flow field data of the secondary reflector in the double reflector antenna

[0010] (5) No other special-shaped reflector antennas are involved

[0012] (1) Only a single field analysis

The above-mentioned methods only provide a method for analyzing a single field of a solid field or a fluid field, and do not involve the relationship between the two fields

[0013] (2) Does not consider the mutual influence of the positional relationship

The fluid calculation method involved does not consider the type of reflector antenna, such as the influence of the secondary reflector on the main reflector in the double reflector antenna, and does not consider the influence of the antenna mount

[0014] (3) Does not involve field coupling issues

For the fluid field and solid field problems involved in engineering, the above three methods do not give corresponding solutions

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