Seismic analysis of TMT M3 cell assembly based on spectral response

SU Yan-qin; ZHANG Jing-xu; WANG Fu-guo; YANG Fei; ZHAO Hong-chao

doi:10.3788/OPE.20142204.0996

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Seismic analysis of TMT M3 cell assembly based on spectral response

Micro/Nano Technology and Fine Mechanics | 更新时间：2020-08-13

- Seismic analysis of TMT M3 cell assembly based on spectral response
- Optics and Precision Engineering Vol. 22, Issue 4, Pages: 996-1003(2014)
- 作者机构：
  
  1. 中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
  2. 中国科学院大学北京,中国,100049
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20142204.0996
  CLC： TH751
- Received：14 March 2013，
  
  Revised：12 April 2013，
  
  Published：25 April 2014
- 稿件说明：
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苏燕芹, 张景旭, 王富国等. 基于谱分析的30m望远镜三镜支撑结构地震分析[J]. 光学精密工程, 2014,22(4): 996-1003

SU Yan-qin, ZHANG Jing-xu, WANG Fu-guo etc. Seismic analysis of TMT M3 cell assembly based on spectral response[J]. Editorial Office of Optics and Precision Engineering, 2014,22(4): 996-1003
苏燕芹, 张景旭, 王富国等. 基于谱分析的30m望远镜三镜支撑结构地震分析[J]. 光学精密工程, 2014,22(4): 996-1003 DOI： 10.3788/OPE.20142204.0996.

SU Yan-qin, ZHANG Jing-xu, WANG Fu-guo etc. Seismic analysis of TMT M3 cell assembly based on spectral response[J]. Editorial Office of Optics and Precision Engineering, 2014,22(4): 996-1003 DOI： 10.3788/OPE.20142204.0996.

摘要

为了满足30 m望远镜（TMT）三镜系统（M3S）对抗震性能的要求，对在返回周期为200年和1000年的地震载荷条件下的三镜支撑结构的性能进行了分析。首先，根据三镜支撑结构的特点，对TMT整体的地震响应谱进行了修正，得到了适用于三镜支撑结构的地震响应谱。然后，分析了三镜支撑结构在不同等级地震激励下的位移、应力和加速度响应。分析结果显示，当返回周期为1000年的地震从水平面内两个正交方向及竖直方向同时传递到三镜支撑结构中时，系统响应最大；此时，三镜支撑结构中各部件的最大加速度为2.844

，最大位移为1.544 mm，最大应力为552.316 MPa，三镜上最大应力为1.401 MPa。根据材料力学性能可知，侧支撑杆会发生破坏，需要采取地震防护措施对三镜进行保护。本文在进行谱分析时较完整地考虑了各项因素，结果数据精确可靠，可为三镜系统的详细设计提供指导。

Abstract

In order to satisfy the anti-seismic requirement of Tertiary Mirror System(M3S)in a Thirty Meter Telescope (TMT)

the structural responses of Tertiary Mirror Cell Assembly (M3CA) under the earthquakes with 200-year and 1000-year return periods were analyzed. Firstly

a seismic response spectrum of M3S was established by modifying the seismic response spectra of TMT according to M3S mechanical character. Then

the structure responses of displacement

stress and acceleration under different level earthquakes were analyzed. The analysis results show that the peak response appeares when the earthquake with 1000-year return periods transmits to M3S in three directions (two horizontal orthogonal and a vertical). The peak acceleration of M3CA

maximum displacement and the peak stress are 2.844

1.544 mm

and 552.316 MPa

respectively

moreover

the peak stress on Tertiary Mirror (M3) is 1.401 MPa. The investigation of material property indicates that the lateral support rods will be broken at this moment and the protective support for M3 is recommended. As a result of sufficient consideration of different influencing factors in spectrum analysis

the data can provide reliable references for detail designs of M3Ss.

关键词

Keywords

references

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