径向加强肋-薄膜伞状天线结构动力学建模与数值仿真

摘要

大型空间可展开抛物面天线由于其特殊的应用价值,近年来广受人们关注.本文研究的径向加强肋-薄膜伞状天线是其中一种典型的非线性结构系统,为了掌握其在轨动力学特性,合理精确地建立径向加强肋-薄膜伞状天线的结构动力学模型至关重要.为描述径向加强肋-薄膜伞状天线物理模型中的预紧力问题,引入温度预应力等效方法解决天线结构模态的初始条件施加问题,通过有限元求解获得了其动力学特性,为径向加强肋-薄膜伞状天线的结构设计与力学研究提供了依据,并为其工程化实施奠定了理论研究基础.%Large deployable parabolic antenna has attracted great attention due to its special value.Radial stiffening rib-membrane umbrella antenna in this article is a typical nonlinear structural system.Establishing the FE model of the radial stiffening rib-membrane umbrella antenna rationally and accurately is very important to study its on-orbit dynamics characteristic.The temperature pretension equivalent method is employed to settle the initial condition and describe the pretension in the physical model of the radial stiffening rib-membrane umbrella antenna.The dynamics characteristic is obtained by FEM calculation,which provides essential data for structure design and mechanical research for the radial stiffening rib-membrane umbrella antenna.