太空发电站参数化有限元建模与设计平台

摘要

在进行太空发电站的动力学与控制研究时,由于其结构尺寸庞大,单元与节点众多,传统有限元建模方法效率极低,通常只能将其假设为刚体或刚柔耦合系统,但这种近似简化处理必然会导致真实动力学特性的缺失.因此,文章提出一种太空发电站参数化有限元建模方法并建立设计平台,旨在缩短有限元建模周期,提高太空发电站设计、分析与优化的效率.以平台式太空发电站为原型,介绍了其基本参数与有限元模型.定义了易用的有限元节点与单元编号规则并给出了参数设置过程.借助APDL 、UIDL ,以及TCL/TK的混合编程技术,建立了太空发电站参数化有限元模块及设计平台,利用简单的菜单及人机交互界面实现电站的参数化有限元建模,设计人员从输入参数到开始建模的前处理时间不会超过2 min ,提高了建模效率.%Due to the large dimension with multiple elements and nodes ,the efficiency of finite element modeling (FEM) using traditional method is very low in dynamics and control simulation of Solar Power Satellite (SPS) . The simplified model only can be assumed as rigid or rigid-flexible system ,which will lead to modeling errors by this approximate simplified way . Firstly ,a parametric FEM method and design platform for SPS were proposed to reduce the FEM modeling period and increase the efficiency of design ,analysis and optimization . Based on planar SPS concept ,the basic parameters and FEM were introduced . Secondly ,the numbering rules for the nodes and elements were defined ,and the process of parametric set was also presented . Based on mixed programming technology of APDL ,UIDL and TCL/TK ,the FEM module and design platform were both constituted . The FEM modeling can be easily realized by menus and human computer interaction interface . The FEM process and the dynamic parameters were both given through a detailed example . The validity and applicability of the proposed method can be proved .