第18卷
第1期
2010年1月
1004-924X(2010)01-0118-08
文章编号
光学精密工程
Optics and Precision Engineering
Vol. 18No.1 Jan.2010
室温硫化胶层建模在透镜结构分析中的应用
韩旭1-2,吴清文"，董得义，陈立恒"，吴雪峰1,2
（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：对透射镜结构中室温硫化(RTV)胶层建模方法进行了研究。给出了节点相连（忽略胶层材料）、各向同性材料（三层体单元和一层体单元)和各向异性材料建立胶层材料模型的方法，分别采用3种方法对透射镜镜组建立了有限元模型，并进行了仿真模态分析。搭建了模态试验装置，测试了它的模态参数。结果表明，各向异性胶层材料的建模方法得到的一阶自由模态额率与试验测试的一阶自由模态题率误差只有0.3%，而各向同性材料的三层单元和一层单元建模方法、节点相连建模方法的误差分别达到1.8%，1.2%和13.9%。分析与测试结果表明，胶层材料在有限元分析当中是
关键调：室温硫化胶；有限元分析；模态分析；模态试验
中图分类号：V475.3;TH703
文献标识码：A
Applicationof RTVadhesive modelingto structure
analysis of reflective mirror
HAN Xu-2,WU Qing-wen', DONG De-yi',CHEN Li-heng',WU Xue-Feng'-2
(l.ChangchunInstituteof Optics,FineMechanicsandPhysics;
ChineseAcademyofSciences,Changchun130033,China;
2.GraduateUniversityof ChineseAcademyof Sciences,Beijing100039,China)
Abstract: The modeling methods for Room Temperature Vulcanization(RTV) adhesive in a reflective mirror structure were investigated. The modelling methods of node-connection(ignoring RTV adhesive)),isotropy(three elements and one element) and anisotropy materials were introduced, respectively. The Finite Element Analysis(FEA) models of lens sets were established by three methods and the simulated mode was analyzed. Furthermore, the mode test equipment was setup and the mode parameters were tested for lens sets, The re sults show that the error of the first-order free mode frequency between the modeling method of anisotropy and the test method is only O. 3% , and the errors obtained from the three modeling methods of the isotropy of three elements, isotropy of one element and node connecting by are 1. 8%, 1. 2% and 13. 9%,respectively. From the anlysis and test, it is concluded that the RTV adhesive can not be ignored in FEA and the modeling method of isotropy of one element is a best choice to reduce number of models and to satisfy engineering re quirements.
Key words: Room Temperature Vulcanization(RTV) adhesive; Finite Element Analysis(FEA); modal
analysis; modal test
收稿日期：2009-04-10；修订日期：2009-04-30 基金项目：国家重大工程资助项目