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

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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Development of Vibration Test Specification for External Store Mounted on Helicopter Using Flight Test

비행 시험을 통한 회전익 항공기에 장착된 외부 장착물의 진동시험 규격 생성

  • 김종환 (LIG넥스원(주) PGM기계융합연구소) ;
  • 박지환 (LIG넥스원(주) PGM기계융합연구소) ;
  • 안선규 (LIG넥스원(주) PGM기계융합연구소)
  • Received : 2024.07.29
  • Accepted : 2024.10.31
  • Published : 2024.12.05
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Abstract

In this study, flight tests were conducted to measure vibrations transferred from the helicopter's bomb rack to the external store. Hovering, S-turns, accelerating, decelerating, ascending, descending, and straight flight were performed according to the flight envelope. Vibration data was measured with 3-axial accelerometers mounted on the external store and converted into PSD(Power Spectral Density) using commercial data software. To identify the vibration level, GRMS values were calculated for all flight conditions. The results confirmed that the measured vibration levels were significantly lower than the MIL-STD-810G vibration profile. Finally, a new vibration test specification was proposed using the VRS(Vibration Response Spectrum) method, which is expected to aid in the development of an optimized design for the external store.

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References

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