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。 |
关键词: 航天器;安装板;热变形;结构优化 |
基金项目: |
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Numerical Analysis and Optimization for Thermal Deformation of High Precision Mounting Plate |
Wang Linghua Liu Xin Gong Mengmeng Wang Haiying Zhang Shaohua
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China Academy of Launch Vehicle Technology Research and Development Center
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Abstract: |
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 50μm is met. |
Key words: spacecraft;mounting plate;thermal deformation;structural optimization |