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《Opto-Electronic Engineering》 2009-04
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Topological Lightweight Design of Space Mirror

SHA Wei1,2,CHEN Chang-zheng1,ZHANG Xing-xiang1,XU Yan-jun1,REN Jian-yue1(1.Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;2.Graduate School of Chinese Academy of Science,Beijing 100039,China)  
In order to satisfy the strict requirement of surface-shape and realize the ultra-lightweight design of the space mirror,the topology method was introduced into the design of a Ф500 mm round space mirror.According to the density method,the SIMP model was established.In the condition of axial-oriented gravity,taking general flexibility as design constraint,minimum volume as design objective,after iterations,better structure was gotten,whose RMS was less than 5nm and lightweight ratio reached 75.83%.In the same weight,the conventional triangular lightweight structure had the RMS of 8.17nm and lightweight ratio of 67.39%.The surface-shape contrast between topology structure and conventional structure was made in the condition of radial-oriented gravity.The computational result meets the requirements of design.The method of topology optimization is better than the conventional method in both the surface-shape and lightweight ratio.
【Fund】: 国家863高技术研究发展计划资助项目(863-2-5-1-13B)
【CateGory Index】: V441
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