气浮隔振平台模态实验分析  

Modal testing and analysis of optical platform

作　　者：张伟[1] 崔鼎[1] 崔云俊[1] 马社[1] 吴春霞[1] 余丽霞[1] 

机构地区：[1]中国工程物理研究院应用电子学研究所,四川绵阳621900

出　　处：《强激光与粒子束》2013年第B05期71-76,共6页High Power Laser and Particle Beams

基　　金：国家高技术发展计划项目

摘　　要：采用ANSYS有限元方法分析了光学平台的自由模态,并以有限元结果作为参考,完成了实际工况下的模态实验,识别了平台整体结构的模态参数,得到了平台在垂向和横向的一阶频率,频率值分别为126.77Hz和361.427Hz。根据分析,该平台的刚度满足光学试验的要求。The free modes of an optical platform were analyzed with finite element method,and then the modal testing was accomplished in actual operating conditions.The first order frequencies in the vertical and horizontal directions of the optical platform were obtained by identifying the modal parameters of the platform structure,which were 126.77 and 361.42 Hz respectively.The stiffness of the platform was verified to meet the requirements for the optical experiments.

关 键 词：光学平台 动力特性 模态仿真 模态测试 锤击法 

分 类 号：O327[理学—一般力学与力学基础]