Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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A Study on the Application Method of Steinberg Fatigue Limit Equation for Electronic Part Life Assessment of Fighter Aircraft Radar

전투기 레이다용 전자부품 수명평가를 위한 Steinberg 피로한계식 적용방안 연구

  • Kim, Deokjoo (The 3rd Research and Development Institute, Agency for Defense Development) ;
  • Hah, Seung Ryong (The 3rd Research and Development Institute, Agency for Defense Development) ;
  • Kang, Minsung (Mechanical Design Team, Hanwha Systems) ;
  • Heo, Jaehun (Mechanical Design Team, Hanwha Systems)
  • 김덕주 (국방과학연구소 제3기술연구본부) ;
  • 하승룡 (국방과학연구소 제3기술연구본부) ;
  • 강민성 (한화시스템(주) 기반기술연구소) ;
  • 허재훈 (한화시스템(주) 기반기술연구소)
  • Received : 2020.04.01
  • Accepted : 2020.07.10
  • Published : 2020.08.05
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Abstract

In this study a methodology to evaluate fatigue life of the electronic parts for the fighter radar unit under random vibration loading is presented. To do this, one parameter for the 3-σ RMS quation of Steinberg fatigue model is modified to come up with a printed circuit board(PCB) with multiple electronic parts, while fundamental frequency and dynamic deflection of the PCB are calculated from a MATLAB based finite element computer code. For the RIFA structure selected in this study, the 3-σ RMS fatigue limit displacement is reduced to 0.741 times as much as the Steinberg model. This investigation allows to assess the life of multiple electronic parts mounted on the PCB with reinforced metal cover/body showing non-sinusoidal deflection patterns.

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References

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