环柱式天线展开过程耦合动力学分析

针对环柱式天线展开过程中斜拉绳索释放运动与桁架展开运动之间耦合动力学分析困难的问题，采用非线性欧拉梁单元对斜拉绳索建模，基于几何精确梁理论对环形桁架建模，提出了环柱式天线多体系统模型，实现了结构展开过程中绳索释放与桁架展开耦合动力学的精准仿真，揭示了绳索柔性等因素对桁架伸展起阻碍作用的机理。仿真结果表明，在环柱式天线展开过程中，减小绳索模量，降低绳索直径，采用单绳索分布设计，有利于提高桁架的展开稳定性。另外，绳索柔性对桁架展开中间阶段影响最为显著。该分析结果为环柱式天线在轨展开动力学预示和优化设计提供了指导作用。

Coupling Dynamics Analysis of Rod cable Antenna Deployment

In order to solve the problem that it is difficult to analyze the coupling dynamics between the release movement of cable and the deployment movement of hoop truss in the process of a deployable rod cable antenna, the nonlinear Euler beam element and the geometric precise beam theory are used to model the cable and hoop respectively, then the multi body system model of the rod cable antenna is proposed. The accurate simulation of the coupling dynamics between the release movement of cable and the deployment of hoop truss is realized, and the mechanism of the cable flexibility and other factors that hinder the hoop truss extension is revealed. The simulation results show that in the deployment process of the rod cable antenna, reducing the modulus and diameter of the cable, and adopting the single cable distribution design are conducive to improving the deployment stability of the truss. In addition, cable flexibility has the most significant influence on the middle stage of truss deployment. The analysis results provide guidance for the dynamic prediction and optimization design of on orbit deployment of rod cable antenna.