Journal of the Computational Structural Engineering Institute of Korea (한국전산구조공학회논문집)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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Assessment of Impact Resistance Performance of Post-tensioned Curved Wall using Numerical Impact Analysis

긴장력이 도입된 곡면벽체의 충돌저항성능 수치해석평가

  • Chung, Chul-Hun (Department of Civil and Environmental Engineering, Dankook Univ.) ;
  • Lee, Jungwhee (Department of Civil and Environmental Engineering, Dankook Univ.) ;
  • Jung, Raeyoung (Structural Systems & Site Evaluation Dept. Korea Institute of Nuclear Safety) ;
  • Yu, Tae-Yong (Department of Civil and Environmental Engineering, Dankook Univ.)
  • 정철헌 (단국대학교 토목환경공학과) ;
  • 이정휘 (단국대학교 토목환경공학과) ;
  • 정래영 (한국원자력안전기술원 구조부지평가실) ;
  • 유태용 (단국대학교 토목환경공학과)
  • Received : 2015.11.02
  • Accepted : 2015.11.10
  • Published : 2016.04.29
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Abstract

In this study, the effect of wall curvature and post-tension force on impact resistance is evaluated by numerical analysis method. A total of twelve cases with two parameters such as wall shape of flat and curved, and consideration of post-tensioning force were included in this study. A 3D detailed finite element model of commercial passenger plane engine is utilized as projectile. The depths of penetration and central displacement calculated from the numerical simulations were compared and analysed. As the results of the numerical simulations of this study, penetration depth was reduced approximately 60~80% due to the application of post-tension force, but the decrease of maximum central displacement was not remarkable. Also, the effect of curvature was relatively insignificant.

이 논문에서는 벽체의 형상(평면벽체, 곡면벽체) 및 벽체에 도입된 긴장력이 충돌저항성능에 미치는 영향을 수치해석적 기법을 사용하여 평가하고자 하였다. 벽체의 곡률 및 긴장력 도입률을 변수로 총 12 케이스의 충돌해석을 수행하였으며, 충돌체로는 상용 민항기엔진의 3차원 상세모델을 사용하였다. 충돌저항성능을 평가하기 위해 관입깊이와 벽체 중앙부 후면의 최대 변위를 비교하였다. 긴장력의 도입에 의해 관입깊이는 약 60~80% 수준으로 감소하는 것으로 나타났으나, 후면 변위는 큰 차이가 나타나지 않았으며, 벽체 형상에 따른 차이는 상대적으로 크지 않은 것으로 나타났다.

Keywords

References

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