考虑接触间隙的FAST节点轻量化分析  

Lightweight analysis of FAST connection with clearances

作　　者：薛建兴[1] 古学东[1] 王启明[1] 南仁东[1] 

机构地区：[1]中国科学院国家天文台,北京100012

出　　处：《机械设计》2013年第9期50-53,77,共5页Journal of Machine Design

基　　金：国家自然科学基金资助项目(11173035)

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。According to FAST connection characters,such as heavy loading,thirty years old design life,outdoor and high-altitude condition,difficulty maintenance,strict safety requirement,two type schemes are presented.To reduce weight of connection,choose cast and forge material,calculate strength standard by using limit states design method and allowable stress method,do some research on contact stress compute method,deduce math expression of shaft and hole installation room and use it as restraint condition,establish APDL model,carry out finite element lightweight analysis,and contrast the two connection schemes.The result shows the analysis reduces the mass of two connections,respectively 11％ and 10％.The research will supply reference for fatigue analysis and prototype development.

关 键 词：强度准则 接触应力 APDL优化分析 

分 类 号：P111.44[天文地球—天文学]