Aerospace Engineering and Technology (항공우주기술)

Korea Aerospace Research Institute (한국항공우주연구원)
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Prediction of Lift-off Acoustic Loads of KSLV-I and Its Comparison with Flight Measurements

KSLV-I 외부 음향 하중 예측 및 비행 시험 결과와의 비교

  • 박순홍 (한국항공우주연구원 발사체구조팀) ;
  • 서상현 (한국항공우주연구원 발사체구조팀) ;
  • 장영순 (한국항공우주연구원 발사체구조팀)
  • Received : 2011.05.17
  • Accepted : 2011.07.01
  • Published : 2011.07.01
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Abstract

Lift off acoustic loads of KSLV-I were predicted by the modified NASA SP-8072 source distribution method (method 2) and the result was compared with those of measurements in the flight test of KSLV-I. In the second flight test, lift off acoustic loads were measured by outer microphones attached on the cable mast. The onboard data measuring outer acoustic pressure at the interstage of KSLV-I also can be obtained. The predicted result showed very similar peak and the shape of spectrum when compared with the measured spectrum and a margin about +7 dB.

수정된 NASA SP-8072 분포 음원 방법 (Method 2)를 이용하여 KSLV-I의 발사 음향 하중을 예측하고, 이 결과를 비행 시험시의 측정 결과와 비교하였다. 2차 비행 시험시에 케이블 마스트의 4개소에서 발사 음향 하중을 측정하였고, 인터스테이지의 텔레메트리 데이터도 입수하여 비교하였다. 예측된 음향 하중 스펙트럼은 측정 스펙트럼과 유사한 피크 주파수 및 형태를 가지며 약 7dB의 안전 여유를 가지고 예측됨을 알 수 있었다.

Keywords

References

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