Journal of Aerospace System Engineering (항공우주시스템공학회지)

The Society for Aerospace System Engineering (항공우주시스템공학회)
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Development and Application of Drop Impact Tester for Aerospace Structures

항공우주구조물 낙하충격시험기 개발 및 응용

  • Yesol Shin (University of Ulsan, Dept. Aerospace Engineering) ;
  • Hyejin Kim (University of Ulsan, Dept. Aerospace Engineering) ;
  • Juho Lee (University of Ulsan, Dept. Aerospace Engineering)
  • 신예솔 (울산대학교 기계공학부 항공우주공학전공) ;
  • 김혜진 (울산대학교 기계공학부 항공우주공학전공) ;
  • 이주호 (울산대학교 기계공학부 항공우주공학전공)
  • Received : 2024.01.30
  • Accepted : 2024.05.16
  • Published : 2024.06.30
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Abstract

In this study, a drop impact tester was developed to comprehensively conduct basic testing and academic research on the drop impact characteristics of aerospace structures. A drop tester enables accurate assessment of the dynamic stresses and deformations that occur when an aircraft collides with the ground, thereby enabling the verification of important design factors, such as safety and mechanical strength. The drop tester consists of an electromagnet to attach and drop the test object, a crane to adjust the drop height of the test object, and a drop support structure for vertical drops. Numerical analysis of the drop test object for the test was performed, and basic tests were performed using the drop impact tester. Through the analysis and test results, the structural shape of the landing gear was analyzed, and the behavior of each part was evaluated.

본 연구에서는 항공우주구조물의 낙하 충격 특성 및 기초 시험, 학술적 연구를 종합적으로 수행하기 위하여 낙하충격시험기를 개발하였다. 낙하충격시험기는 항공기가 지면과의 충돌 시 발생하는 동적인 응력과 변형에 대한 정확한 평가를 가능하게 하며, 안전성 및 기구 강도와 같은 중요한 설계 요소들을 확인할 수 있도록 한다. 낙하충격시험기는 전자석을 이용하여 시험체를 부착 및 낙하하며, 크레인을 이용하여 시험체 낙하 높이 조절이 가능하도록 구성하였다. 또한, 수직 낙하를 위한 낙하보조장치를 제작하였다. 시험을 위한 낙하 시험체의 수치해석을 수행하고 낙하충격시험기를 활용하여 기초 시험을 수행하였다. 해석 및 시험 결과를 통해 착륙장치 낙하 상황에서의 구조적 형상을 분석하고 각 부분의 거동을 종합적으로 평가하였다.

Keywords

Acknowledgement

본 과제(결과물)는 2024년도 교육부의 재원으로 한국연구재단의 지원을 받아 수행된 지자체-대학 협력기반 지역혁신 사업의 결과입니다. (2021RIS-003)

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