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中国光学 2010, 1(2) 146-151  ISSN: 2095-1531 CN: 1400/O4

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空间光学
柔性铰链的有限元法设计与分析
单云霄1,2, 陈长征1, 刘磊1, 任建岳1 ,王兵1
1.中国科学院 长春光学精密机械与物理研究所,吉林 长春 130033; 2.中国科学院 研究生院,北京 100039
摘要: 大变形、小应力、小中心漂移的柔性铰链的研制一直是柔性铰链研究的难题。本文在参考国外某款柔性铰链的基础上,利用V型结构设计、叠加理论和对称布置方法设计了一种新型的柔性铰链。针对这种柔性铰链的设计进行了概念性研究,建立了铰链的数学模型,研究了这种新型柔性铰链的性能。有限元方法分析表明,该设计方法增加了铰链柔性部分的长度,降低了它的中心漂移和最大应力,得到其最大转角约为16°,最大中心漂移为3.557 μm,最大应力为499.8 MPa,满足了最初的设计指标要求。结果证明该铰链具有一定的实用价值。
关键词 蝶型柔性铰链   柔性单元   V型设计   中心漂移补偿   最大应力   最大转角  
Design and analysis of flexure hinge by finite element method
SHAN Yun-xiao1,2,CHEN Chang-zheng1,LIU Lei1 ,REN Jian-yue1,WANG Bing1
1.Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;2.Graduate University of Chinese Academy of Sciences,Beijing 100039,China
Abstract: The development of flexure hinges with large deflection, low stress, small parasitic center shift has always been a difficult problem. On the basis of some foreign flexure hinges, this paper designed a new kind of flexure hinge by using a V shape structure, symmetric layout and the superposition principle. The concept design theory of this flexure hinge was analyzed, and a mathematic model was established to analyze its performance. Analyzed results show that the length of flexure part for the hinge has increased and its parasitic center shift and maximal stress have decreased. Finite element method indicates that its maximal deflection is about 16°, maximal parasitic center shift is 3.557 μm, and maximal stress is 499.8 MPa, respectively, which meets the requirement of design target and the results prove that this flexure hinge has a good quality in practices.
Keywords: butterfly flexure hinge   flexure element   V shape design   parasitic center shift compensation   maximal stress   maximal deflection  
收稿日期 2009-01-11 修回日期 2010-03-13 网络版发布日期  
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通讯作者: 单云霄
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