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한국형 기동헬기 전기체 지상진동시험

Ground Vibration Test for Korean Utility Helicopter

  • 투고 : 2013.02.28
  • 심사 : 2013.05.31
  • 발행 : 2013.06.01

초록

한국형 기동헬기는 블레이드 가진주파수를 회피하고 지상 운용에서 로터와 기체의 동적 특성이 연계되어 나타나는 불안정성이 없도록 설계되었다. 이러한 설계 목적을 위해 진동 해석과 지상공진 해석을 수행하여 기체와 주로터의 동적 특성을 분석하였다. 이후 훨타워 시험을 통해 주로터의 동적특성을 확인하였으며 지상진동시험을 통해 기체의 동적 특성을 확인하였다. 지상진동시험은 지상 및 비행 운용 조건이 고려된 시험체 구성과 시험 조건을 적용하여 수행되었다. 본 논문에서는 한국형 기동헬기에 적용된 지상진동시험 방법 및 분석 기법을 보이고 해석 모델 보정기법과 보정된 해석 결과를 제시한다.

Korean Utility Helicopter (KUH) has been designed to avoid the blade passing frequency and any instability due to a coupling of dynamic characteristics between the main rotor and the airframe in ground operation. For these design objectives, the vibration analysis and the ground resonance analysis were performed to analyze the dynamic characteristics of the airframe and the main rotor. Then, the whirl-tower test was conducted to identify the dynamic characteristics of the main rotor and the ground vibration test (GVT) was conducted to identify the dynamic characteristics of the airframe. The GVT for KUH was conducted with the test conditions and test articles established in consideration of each flight and ground condition. This paper shows the method and technique for performing the GVT for KUH and presents the correlation technique and the results for the correlated analysis model.

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참고문헌

  1. Joa-keun Park, Se-hee Kim, Dong-il Kwak and Bok-woo Lee, "Ground Resonance Analysis for the Class of Korean Utility Helicopter", Journal of The Korean Society for Aeronautical and Space Sciences, Spring Conference, 2007, pp.890-893
  2. Peter Konstanzer, "Recent Advances in Eurocopter's Passive and Active Vibration Control", American Helicopter Society 64th Annual Forum, 2008.
  3. Dong-il Kwak, Se-hee Kim, Joa-keun Park and Bok-woo Lee, "Air Resonance Analysis for the Korean Utility Helicopter", Journal of The Korean Society for Aeronautical and Space Sciences, Fall Conference, 2007, pp.700-703
  4. Dae-hyeon Cho, Chang-heon Han, Sang-wook Lee and Seong-Jun Lee, "Full Scale Ground Vibration Test for Advanced Trainer", The 8th Symposium on Aircraft Development Technology, 2002, pp.430-433
  5. MIL-A-8870C, Airplane Strength and Rigidity Vibration, Flutter, and Divergence, Mar. 1993.
  6. Bart Peeters, Hector Climent, "Modern solutions for Ground Vibration Testing of large aircraft", IMAC 2008.2
  7. Laurent GIRARD, Pascal LUBRINA, "Ground Vibrations Tests For The High Speed Dolphin Helicopter", American Helicopter Society 49th Annual Forum, 1993

피인용 문헌

  1. Satellite finite element model updating for the prediction of the effect of micro-vibration vol.42, pp.8, 2014, https://doi.org/10.5139/JKSAS.2014.42.8.692
  2. Vibration Reduction Devices for Korean Utility Helicopter vol.41, pp.12, 2013, https://doi.org/10.5139/JKSAS.2013.41.12.987