长焦距空间光学遥感器支撑结构有限元分析

为了提高长焦距空间光学遥感器主支撑结构的刚度，实现结构的轻量化，分析了几种常用的空间支撑结构材料，并结合三反离轴光学系统的特点，用有限元分析软件MSC．PATRAN建立了几种不同支撑结构的有限元模型。对其进行了模态分析，并对支撑结构在温度场和重力场影响下的变化进行了研究，从而对实际工程中光学遥感器结构的材料及构型选择提供了参考，对大型离轴三反空间光学遥感器主支撑结构的设计具有一定指导意义。

Finite Element Analysis of Long-Focus Space Optical Remote Sensor Supporting Structure

In order to improve the stiffness of long-focus space optical remote sensor main supporting structure and to achieve the light weight structures, this paper analyzes the material properties for several frequently used space supporting structures and uses FEA software MSC. PATRAN to construct the corresponding FEA models for them with the consideration of the characteristics of the off-axis three-mirror optical system. The modal analysis has been processed for these FEA models. The change of supporting structures caused by temperature field and gravity field has also been investigated. The simulated results provide some ideas for the selection of material and configuration of the optical remote sensor structure, and some instructions for the design of the large-scale off-axis TMA space optical remote sensor main supporting structure.