光电工程
光電工程
광전공정
OPTO-ELECTRONIC ENGINEERING
2015年
6期
45-49
,共5页
光电经纬仪%跟踪架%模态分析%机械谐振频率
光電經緯儀%跟蹤架%模態分析%機械諧振頻率
광전경위의%근종가%모태분석%궤계해진빈솔
photo-electric theodolite%tracking frame%model analysis%mechanical resonant frequency
在光电经纬仪中，望远镜的口径越大，对跟踪架的结构刚度要求越高。因此对于跟踪架的结构设计备受关注。本文以地平式U型跟踪架为例，对其中的两个关键部件如四通和转台采用方钢管桁架结构进行设计，结合有限元设计及模态分析，求解其固有的谐振频率。通过与传统的钢板焊接结构比较，结果表明方钢管桁架结构刚度更高，重量更轻。对于口径达到1 m的地平式经纬仪跟踪架，重量达到6200 kg时，经过激振试验和扫频测试，测得机械谐振频率达到了78 Hz。
在光電經緯儀中，望遠鏡的口徑越大，對跟蹤架的結構剛度要求越高。因此對于跟蹤架的結構設計備受關註。本文以地平式U型跟蹤架為例，對其中的兩箇關鍵部件如四通和轉檯採用方鋼管桁架結構進行設計，結閤有限元設計及模態分析，求解其固有的諧振頻率。通過與傳統的鋼闆銲接結構比較，結果錶明方鋼管桁架結構剛度更高，重量更輕。對于口徑達到1 m的地平式經緯儀跟蹤架，重量達到6200 kg時，經過激振試驗和掃頻測試，測得機械諧振頻率達到瞭78 Hz。
재광전경위의중，망원경적구경월대，대근종가적결구강도요구월고。인차대우근종가적결구설계비수관주。본문이지평식U형근종가위례，대기중적량개관건부건여사통화전태채용방강관항가결구진행설계，결합유한원설계급모태분석，구해기고유적해진빈솔。통과여전통적강판한접결구비교，결과표명방강관항가결구강도경고，중량경경。대우구경체도1 m적지평식경위의근종가，중량체도6200 kg시，경과격진시험화소빈측시，측득궤계해진빈솔체도료78 Hz。
The larger the telescope aperture, the structural rigidity of the requirements for tracking aircraft higher, for photo-electric theodolite. Photo-electric theodolite’s aperture is designed related to tracking frame, so tracking frame is more and more attention. In this paper, U-type track frame horizon as an example, the two key components are designed with square steel tube truss structure. By finite element design and modal analysis, solving the inherent resonant frequency. In the last, we used to design in steel casting and welding methods. This paper discusses a new design of welded steel pipes. And it has a modal analysis. So that it has a greater carrying capacity and higher stiffness and lighter, more abundant reserves of torque. The mechanical resonance frequency is 78 Hz for tracking frame after a vibration test and sweep test.
