光学仪器高精度安装板热变形分析及优化  

Numerical Analysis and Optimization for Thermal Deformation of High Precision Mounting Plate

作　　者：王领华[1] 刘欣[1] 吕建伟[1] 王海英[1] 张少华[1] 

机构地区：[1]中国运载火箭技术研究院研发中心,北京100076

出　　处：《航天制造技术》2017年第2期19-22,共4页Aerospace Manufacturing Technology

基　　金：中国运载火箭技术研究院低温推进剂在轨蒸发量控制院创新基金经费资助

摘　　要：以某航天器光学设备高精度安装板为研究对象,建立了热变形分析数学模型,并利用NX/TMG有限元软件分析了安装板在轨条件下的热变形。针对安装板变形幅值较大的情况,采用加筋和局部优化的方法,提高安装板的整体刚度,减小热变形幅值,并分析优化后的安装板热变形,结果表明:安装板采用加筋和局部优化后,在轨条件下热变形幅值由84.4μm减小为32.5μm,优化效果明显,满足安装板热变形幅值不超过50μm的精度指标要求。This paper took a high precision mounting plate for an optical device of a spacecraft as the research object, established a mathematical model of the thermal deformation analysis and used the NX/TMG finite element software to analyze the thermal deformation of the mounting plate under on orbit condition. To solve the problem of large deformation amplitude of mounting plate, this paper adopted the method of reinforcement and local optimization, to improve the overall stiffness of the mounting plate and reduce the amplitude of thermal deformation. The software is used to analyze the thermal deformation of the optimized mounting plate. The result shows that after the mounting plate reinforced and partially optimized, the amplitude of thermal deformation under on orbit condition is reduced from 84.4μm to 32.5μm. The impact of the optimization is obvious and the accuracy requirements of thermal deformation amplitude of the mounting plate not more than 50~tm is met.

关 键 词：航天器 安装板 热变形 结构优化 

分 类 号：V441[航空宇航科学与技术—飞行器设计]