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Deployment dynamic analysis of deployable antennas considering thermal effect

机译：考虑热效应的可展开天线展开动态分析

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Dynamic analysis of flexible multibody systems is complex. Several successful methods have been demonstrated. However, few works discussed the dynamic performance of the flexible multibody under different temperatures. This paper uses the absolute nodal coordinate formulation to analyze the flexible body dynamics of deployment structures under different temperatures to simulate space environments. The dynamic equations of finite element in temperature field are developed. Then a computer-aided simulation of flexible multibody systems in temperature field is implemented. A general four-bar mechanism under different temperatures as a simulation example is demonstrated, and the deployment characteristics of a special four-bar mechanism as a basic module of the hoop truss deployable antenna is analyzed under different temperatures in order to evaluate the dynamic performance of the deployable antenna in space environments. The simulation results indicate the influence factors of deployment dynamic characteristics include the structural form, material properties, geometric parameters and deployment planning in ambient and thermal/vacuum environments.
机译：柔性多体系统的动态分析非常复杂。已经证明了几种成功的方法。然而，很少有文章讨论柔性多体在不同温度下的动态性能。本文采用绝对节点坐标公式来分析不同温度下展开结构的柔性体动力学，以模拟空间环境。建立了温度场中有限元动力学方程。然后在温度场上对柔性多体系统进行了计算机辅助仿真。以普通四杆机构在不同温度下的仿真实例为例，分析了一种特殊的四杆机构作为箍桁架可展开天线的基本模块的展开特性，以评价其动态性能。在太空环境中的可部署天线。仿真结果表明，部署动态特性的影响因素包括结构形式，材料特性，几何参数以及环境和热/真空环境下的部署计划。

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