Reticular deployable antenna deploying process cable force analysis method

Abstract

The invention provides a reticular deployable antenna deploying process cable force analysis method. The reticular deployable antenna deploying process cable force analysis method mainly includes steps: selecting the number and geometric parameters of peripheral truss units of a reticular deployable antenna, a material parameter D of a cable net, a geometric parameter S, a network cable topology structure and the number M of discrete working conditions of a deploying process; calculating a change motion trail of positions of connection points of trusses and the cable net; calculating a stress state of each cable unit under each working condition; fitting a changing curve F(theta) of acting force of the cable net for a boundary connection point along with changes of a spread angle; finally, using changing cable net acting force as a load, substituting the load into a flexible multiple body dynamics model, and performing dynamics analysis. The reticular deployable antenna deploying process cable force analysis method regards the deploying process of the reticular deployable antenna as a series of discrete loaded mechanism balance forms, studies strain distribution of each balance form, accurately obtains a cable force changing curve of the deploying process, and provides effective support for ground engineering to achieve influence mechanism analysis of cable net tension for the deploying process based on flexible multiple body system dynamics modeling and analysis.

Description

technical field [0001] The invention relates to the technical field of boundary motion cable structure tension analysis and its application, in particular to a cable force analysis method during the deployment process of a mesh-like deployable antenna. Background technique [0002] The deployment process of deployable antenna is a complex nonlinear mechanical process, which is the transformation from unstable state to stable state, and from mechanism to structure. The smooth deployment in orbit is the basis for the application of deployable antennas, and it is also one of the links most prone to failure. Therefore, in the design stage, the nonlinear influencing factors such as flexibility, friction, and cable net tension are accurately analyzed to realize the prediction of the dynamic behavior of the antenna deployment process, which has a guiding role in improving and perfecting the structural design of the antenna. The reflector cable net is gathered in the middle of the ...

AI Technical Summary

Problems solved by technology

In this approximation method, the loading time of the cable net tension on the truss is generally set by engineers based on experience, which lacks theoretical basis; at the same time, it is assumed that the tension of the cable and the deployment time change linearly, which also deviates from the actual situation. Eventually lead to large errors in the analysis results

There are also researches on modeling and analysis methods based on a large number of cable-strut elements approximating curved cables. However, it is difficult to meet the engineering requirements in terms of calculation amount and approximation error.

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