考虑接触间隙的FAST节点轻量化分析

发布时间：2017-12-27 07:47

本文关键词：考虑接触间隙的FAST节点轻量化分析　出处：《机械设计》2013年09期 　论文类型：期刊论文

【摘要】：针对射电望远镜FAST节点受力大、设计寿命30年、高空野外使用、后期维护不便、安全性要求高的特点,提出了两种节点方案。为降低节点自质量,分析选取了铸钢及锻造节点材料,计算了极限状态法与许用应力法的强度准则,研究了考虑间隙的接触应力计算方法,推导了满足销轴装配空间的数学表达式,并以此作为优化设计的约束条件,建立了节点参数化APDL程序模型,完成了节点轻量化有限元分析,并对比了两种节点方案。结果表明,两种节点质量分别减低了11%,10%。该研究为后续节点疲劳分析及样件研制提供了参考。
[Abstract]:Aiming at the characteristics of the FAST node of radio telescope, such as the large force of the node, the design life of 30 years, the high-altitude field application, the late maintenance and the high safety requirements, two node schemes are proposed. In order to reduce the node self quality, analysis and selection of cast steel and forging joint materials, strength criterion should use force method and a limit state method is calculated, considering the gap contact stress calculation method, the mathematical expression is deduced to meet pin assembly space, and as a constraint optimization design, is established node parameter APDL model, the node weight of finite element analysis and comparison of two kinds of node scheme. The results show that the quality of the two kinds of nodes is reduced by 11% and 10% respectively. The study provides a reference for the fatigue analysis and sample development of subsequent nodes.
【作者单位】：中国科学院国家天文台;
【基金】：国家自然科学基金资助项目(11173035)
【分类号】：P111.44
【正文快照】： 500 m口径球反射面射电望远镜FAST(Five-hun-dred-meter Aperture Spherical radio Telescope)是我国重大科技基础建设项目,建成后将是国际上最大、最灵敏的射电天文望远镜[1]。FAST节点用于连接6根主索、6组反射面单元及1根下拉索,将下拉索的位移控制传递到反射面单元面板,

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