Journal of the Korean Society for Nondestructive Testing (비파괴검사학회지)

The Korean Society for Nondestructive Testing (한국비파괴검사학회)
권호 표지
DOI QR코드

DOI QR Code

Structural Analysis of High Precision Reflector Using Finite Element Analysis

유한요소해석법을 이용한 고정밀 반사경의 구조 해석

  • 이상용 (한국기초과학지원연구원 첨단장비개발사업단) ;
  • 김기석 (한국기초과학지원연구원 첨단장비개발사업단) ;
  • 김건희 (한국기초과학지원연구원 첨단장비개발사업단) ;
  • 이영신 (충남대학교 기계설계공학과)
  • Received : 2013.03.15
  • Accepted : 2013.04.10
  • Published : 2013.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, the effect of bolt clamping force and form accuray of contact surface between mirror and mount on mirror surface was studied. Normally, mirror used in reflecting optical system was assembled with mount by bolts or adhesive. In this case, the tension caused by bolt clamping force or adhesive force may distort the mirror surface. Also, form accuracy error of the contact surface have a negative impact on wrenched mirror surface which assembled by bolts or adhesive. In this study, stress and distorted displacements on mirror surface were analyzed according to the different contact surface form accuracies and bolt clamping forces by using the finite element analysis method.

본 논문은 마운트의 형상 정밀도와 볼트의 체결력에 따라 마운트에 고정되는 반사경에 발생되는 응력과 변형량에 대해 연구하였다. 일반적인 반사광학계에 사용되는 고정밀 반사경은 볼트나 접착제로 마운트에 조립되는데 이러한 경우 볼트의 체결력과 접착제의 접착력으로 인해 발생하는 장력이 반사경면을 뒤틀리게 한다. 또한 반사경과 마운트를 조립한 후 반사경에 접촉되는 마운트의 표면 형상 정밀도에 따라 반사경면이 뒤틀려서 형상 정밀도가 변한다. 본 논문에서는 유한요소법을 이용한 구조 해석을 통해 반사경과 접촉되는 마운트의 형상 정밀도와 볼트의 체결력에 의해 고정밀 반사경의 반사경면에 발생되는 응력분포와 뒤틀림 변형량에 대해 연구하였다.

Keywords

References

  1. A. M. Hvisc and J. H. Burge, "Structure function analysis of mirror fabrication and support errors," Optical Manufacturing and Testing VII, Proceeding the Society of Photo-Optical Instrumentation Engineers 6671, pp. 1-10 (2007)
  2. M. K. Cho, J. D. Vries and E. Hansen, "Performace evaluations of the ATST secondary mirror," New Developments in Potomechanics, Proceeding the Society of Photo-Optical Instrumentation Engineers 6665, pp. 1-13 (2007)
  3. S. Y. Yu, H. S. Yi, J. H. Lee, H. S. Yim, Y. J. Choi, H. S. Yang, Y. W. Lee, H. K. Moon, Y. I. Byun and W. Y. Han, "Performance improvement of near earth space survey(NESS) wide-field telescope (NESS-2) optics," Journal of Astronomy and Space Sciences, Vol. 27, No. 2, pp. 153-160 (2010) https://doi.org/10.5140/JASS.2010.27.2.153
  4. B. H. Kim, J. U. Lee, I. Moon, H. S. Yang, H. Y. Kihm and Y. W. Lee, "Optimization of 30 cm lightweight mirror," Korean Journal of Optics and Photonics, Vol. 21, No. 5, pp. 214-223 (2010) https://doi.org/10.3807/KJOP.2010.21.5.214
  5. S. C. Yang, G. H. Kim, H. S. Kim, S. Y. Lee, M. S. Kim and J. H. Won, "The technique of ultra precision machining of infrared optical-system for space," Journal of Korean Society for Precision Engineering, Vol. 24, No. 2, pp. 19-24 (2005)
  6. S. C. Yang, G. H. Kim, H. S. Kim, H. S. Shin and J. H. Won, "A study on the characteristics on ultra precision machining of IR camera mirror," Journal of Korean Society for Precision Engineering, Vol. 23, No. 5, pp. 44-50 (2006)
  7. B. H. Kim, J. U. Lee, I. Moon, H. S. Yang, H. Y. Kim and Y. W. Lee, "Optimization of 30 cm lightweight mirror," Korean Journal of Optics and Photonics, Vol. 21, No. 5, pp 214-223 (2010) https://doi.org/10.3807/KJOP.2010.21.5.214
  8. J. H. Burge, L. B. Kot, H. M. Martin, R. Zehnder and C. Zhao, "Design and analysis for interferometric measurements of the GMT primary mirror segments," Optomechanical Technologies for Astronomy, Proceeding the Society of Photo-Optical Instrumentation Engineers 6273, pp. 22-1-22-21 (2006)