中国光学（中英文）2024，Vol.17Issue(4)：896-908,13.DOI:10.37188/CO.2023-0227
星载二维转台U型架结构轻量化与优化设计
Lightweight and optimized U-frame design for space-borne two-dimensional turntable
摘要
Abstract
Space-borne two-dimensional turntables are the main bearing mechanism of space cameras and other optoelectronic equipment,and the U-frame is the key supporting part of these turntables.In order to op-timize the structure and lightweight design of the U-frame of the two-dimensional turntable and to develop a lightweight two-dimensional turntable with a high load-bearing ratio,we design a U-frame for the space two-dimensional turntable based on Carbon Fiber Reinforce Plastics(CFRP).First,a variable cross-section tubu-lar structure U-frame was designed using carbon fiber composites instead of titanium alloy material consider-ing the manufacturability.Then,according to the finite element modeling method based on the lay-up pro-cess,the carbon fiber U-frame was subjected to finite element modeling and simulation analysis.Then,a pro-totype U-frame was fabricated,and modal tests verified the accuracy of the finite element model.Finally,a three-level optimization method combining theoretical analysis,genetic algorithm,and the finite element method was proposed to optimize the design of carbon fiber U-frame ply angle,ply thickness,and ply se-quence.The results indicate that the vibration patterns of the U-frame obtained from the modal test and simu-lation are identical and that the frequency difference is less than 5% .The initial design of the carbon fiber U-frame is 45.7% lighter than the titanium U-frame.Through the secondary optimization of the composite lay-up,the U-frame is further reduced in weight by 13.8% .Additionally,the intrinsic frequency of the U-frame is improved by 10.14% .It can be concluded that the composite modeling and optimization methods used in this paper are correct,and the designed carbon fiber U-frame meets the lightweight design requirements of space-born two-dimensional turntable.关键词
结构优化设计/轻量化设计/碳纤维复合材料/有限元分析/星载二维转台/遗传算法Key words
structural optimization design/lightweight design/carbon fiber composites/finite element ana-lysis/space-borne two-dimensional turntable/genetic algorithm分类
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魏钰轩,王振宇,李治国,黄乐弘,杨凯,马玉宝..星载二维转台U型架结构轻量化与优化设计[J].中国光学（中英文）,2024,17(4):896-908,13.基金项目
国家重点研发计划项目资助(No.2022YFB3707804)Supported by National Key Research and Development Program of China(No.2022YFB3707804) （No.2022YFB3707804）
