Journal of Aerospace System Engineering (항공우주시스템공학회지)

The Society for Aerospace System Engineering (항공우주시스템공학회)
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Stress Analysis of the GEO-KOMPSAT-2 Tubing System

정지궤도복합위성 추진계 배관망 구조해석

  • Jeong, Gyu (Department of Mechanical Engineering, Chonbuk National Univ.) ;
  • Lim, Jae Hyuk (Department of Mechanical Engineering, Chonbuk National Univ.) ;
  • Chae, Jongwon (Satellite Mechanical Department, Korea Aerospace Research Institute) ;
  • Jeon, Hyung-Yoll (Satellite Mechanical Department, Korea Aerospace Research Institute)
  • 정규 (전북대학교 기계공학과) ;
  • 임재혁 (전북대학교 기계공학과) ;
  • 채종원 (한국항공우주연구원 위성기계팀) ;
  • 전형열 (한국항공우주연구원 위성기계팀)
  • Received : 2017.10.02
  • Accepted : 2018.01.04
  • Published : 2018.02.28
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Abstract

In this paper, the structural analysis of the Geostationary Korea Multi-Purpose Satellite-2 (GEO-KOMPSAT-2) tubing system is discussed, and the structural integrity of the tubing system is assessed by comparative analysis with the results of overseas partner AIRBUS. Securing structural reliability of the tubing system is a very important key element of the propulsion system of the GEO-KOMPSAT-2 satellite. Therefore, FE modeling of the propulsion tubing was carried out directly using the CAE program, and structural analysis was performed to evaluate the stress state under launch conditions. Hoop stress, axial stress, bending stress, and torsion stress were calculated according to diverse load conditions by using pressure stress analysis, thruster alignment analysis, sine qualification load analysis, and random qualification load analysis. From the results, the Margin of Safety (MoS) of the tubing system is evaluated, and we can verify the structural integrity of the tubing system when subjected to various launch loads.

본 논문에서는 정지궤도복합위성 추진계 배관망의 독자적인 구조해석을 실시하였고, AIRBUS의 구조해석결과와 비교분석을 통해 추진계 배관망의 구조적 건전성 및 해석방법의 신뢰성을 평가하였다. 추진계 배관망의 구조적 신뢰성 확보는 정지궤도복합위성 추진계의 매우 중요한 핵심요소이다. 따라서 CAE 프로그램을 통해 직접 추진계 배관망 모델링을 수행하였고, 발사환경에서 구조해석을 실시하여 응력을 도출하였다. 내압응력해석, 조립정렬해석, 정현파진동해석, 랜덤진동해석의 하중조건에 따라 Hoop stress, Axial stress, Bending stress, Torsion stress를 구하였고, 이를 모두 고려한 von Mises 응력 계산 후 안전여유 결과 값을 도출함으로써 추진계 배관망의 구조적 건전성을 판단하였다.

Keywords

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