KSLV-I 외부 음향 하중 예측 및 비행 시험 결과와의 비교
Prediction of Lift-off Acoustic Loads of KSLV-I and Its Comparison with Flight Measurements
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참고문헌
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초록
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.
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.
참고문헌 (7)
- Park, S.-H., "Lift-off Vibro-acoustic Analysis of the Upper Stage of Small Launch Vehicle", ICSV 13 (2006)
- Troclet, B., "Synthesis of Vibroacoustic Studies Performed during Ariane 5 Program" (1999), 1er Colloque Europeen sur la Technologie des Lanceurs "Vibration des Lanceurs" Toulouse
- Park, S.-H., "Experimental Evaluation of Passive Acoustic Absorbers for the Reduction of Acoustic Loads of Launch Vehicles", Proceedings of the KSNVE Annual Autumm Conference, pp.615~616 (2009)
- Acoustic Loads Generated by the Propulsion System, "Eldred, K.", NASA, ~, pp.SP-8072 (1971)
- Haynes, J., "Modifications to the NASA SP-8072 Distributed Source Method II for Ares I Lift-off Environment Predictions", 15th AIAA, 2009, 2009~3160
- M. E. Goldstein, "Aeroacoustics" (1976), McGraw Hill
- H. R. Mull, "Effect of Jet Structure onNoise Generation by Supersonic Nozzles", Journal of the Acoustical Society of America, 31(2), pp.147~149 (1959)