한국소음진동공학회논문집 (Transactions of the Korean Society for Noise and Vibration Engineering)

  • 제20권10호
  • /
  • Pages.983-990
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  • 2010
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  • 1598-2785(pISSN)
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  • 2287-5476(eISSN)
한국소음진동공학회 (The Korean Society for Noise and Vibration Engineering)
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높은 입사 음압에서의 미세 천공판을 이용한 흡음 기구의 설계

Design of a Micro-perforated Panel Absorber at High Incident Sound Pressure

  • 박순홍 (한국항공우주연구원 발사체연구본부) ;
  • 서상현 (한국항공우주연구원 발사체연구본부) ;
  • 장영순 (한국항공우주연구원 발사체연구본부)
  • 투고 : 2010.09.03
  • 심사 : 2010.09.29
  • 발행 : 2010.10.20
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초록

Reduction of acoustic loads of space launch vehicles can be achieved by acoustic absorbers satisfying strict cleanness requirements. This limited the use of general porous materials and requires non-porous sound absorbers. Micro-perforated panel absorbers(MPPA) is one of promising sound absorbers satisfying the cleanness requirement for launch vehicles. However, its applicability was limited to low sound pressure levels according to the acoustic impedance model of micro-perforated panels. In this paper the applicability of micro-perforated panel absorbers at high incident sound pressure was investigated in experimental ways. The absorption characteristics of a micro-perforated panel absorber was simulated according to its design variables, e.g., minute hole diameters and aperture ratios. It was shown that optimal design can be readily done by using proposed design charts. Experiments were conducted to measure acoustic properties of the designed micro-perforated panel absorbers. The results showed that acoustic resistance increases rapidly as incident sound pressure level does but change of acoustic reactance can be neglected in a practical point of view. This caused the decrease of peak value of absorption coefficient at high incident sound pressure level, but the amount of reduction can be accepted in practice. The major advantage of the micro-perforated panel absorber(wide absorption bandwidth) was still kept at high sound pressure level.

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참고문헌

  1. Park, S.-H., Seo, S.-H., Jeong, H.-K., Jang, Y.-S., Yi, Y.-M. and Cho, G.-R, 2006, “Lift-off Vibro-acoustic Analysis of the Upper Stage of Small Launch Vehicle,” ICSV 13, Vienna, Austria.
  2. Troclet, B., Chemoul, B., Roux P., Gely D. and Elias, G., 1999, “Synthesis of Vibroacoustic Studies Performed during Ariane 5 Program,” 1er Colloque Europeen sur la Technologie des Lanceurs “Vibration des Lanceurs” Toulouse, France.
  3. Park, S.-H., Seo, S.-H. and Jang, Y.-S., 2009, “Experimental Evaluation of Passive Acoustic Absorbers for the Reduction of Acoustic Loads of Launch Vehicles,” Proceedings of the KSNVE Annual Autumn Conference, pp. 615-616.
  4. Maa, D.-Y., 1998, “Potential of Microperforated Panel Absorber,” J. Acoust. Soc. Am., Vol. 104, No. 5, pp. 2861-2866. https://doi.org/10.1121/1.423870
  5. Crandall, I. B., 1926, “Theory of Vibrating Systems and Sound,” D. Van Nostrand Company, NewYork, pp. 229-241.
  6. Seybert, A. F. and Ross, D. F., 1977, “Experimental Determination of Acoustic Properties Using a Two-microphone Random-excitation Technique,” J. Acoust. Soc. Am, Vol. 61, No. 5, pp. 1362-1370. https://doi.org/10.1121/1.381403
  7. Ingard, U., 1953, “On the Theory and Design of Acoustic Resoantors,” J. Acoust. Soc. Am, Vol. 25, No. 6, pp. 1037-1062. https://doi.org/10.1121/1.1907235
  8. Ingard, U. and Labate, S., 1950, “Acoustic Circulation Effects and the Nonlinear Impedance of Orifices,” J. Acoust. Soc. Am, Vol. 22, No. 2, pp. 211-218. https://doi.org/10.1121/1.1906591
  9. Ingard, U. and Ising, H., 1967, “Acoustic Nonlinearity of an Orifice,” J. Acoust. Soc. Am, Vol. 42, No. 1, pp. 6-17. https://doi.org/10.1121/1.1910576
  10. Lee. Y. Y., Lee, E. W. M, and Ng, C. F. 2005, “Sound Absorption of a Finite Flexible Micro-perforated Panel Backed by an Air Cavity,” Journal of Sound and Vibration, Vol. 287, No. 1/2, pp. 227-243. https://doi.org/10.1016/j.jsv.2004.11.024