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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.11
- 수록면
- 1,013 - 1,019 (7page)
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Sound attenuation of periodically arranged cylindrical rods is studied numerically and experimentally. Cross section of the cylinder is circular and arrays are in a square lattice. Cylinders are made of steel, and consist of five groups with different diameters from 27.2 mm to 48 mm. Each group has 5 rows, while number of cylinders in a row varies from 17 to 31. The area filling fraction is about 60~61 %, which leads to the stop bandgap(2.9 kHz ~ 8.4 kHz). Sound attenuation is computed using two-dimensional BEM, and measurement is done by using a speaker and microphones in a semi-anechoic room. Comparison of the results by BEM and experiment shows that attenuation spectra are qualitatively in agreement, although experiment gives higher attenuations than BEM. After results by BEM are scaled up in accordance with cylinder diameter, it is observed that attenuation curves are in good agreement, which confirms that analysis by BEM is done correctly. It is also found that the measured bandgaps are shifted toward lower frequency by 0.5 kHz ~ 1.2 kHz, when compared to the predictions obtained from infinitely repeated two-dimensional cylinder arrays.
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참고문헌 (14)
참고문헌 신청
1. [학술지(정기간행물)] - Krauss, T. F. / 1996 / Two-dimensional Photonic Bandgap Structures Operating at near-Infrared Wavelengths / Nature 383 : 699 ~ 702
2. [학술지(정기간행물)] - Pennec, Y. / 2010 / Two-dimensional Phononic Crystals: Examples and Applications / Surface Science Reports 65 : 229 ~ 291
3. [학술지(정기간행물)] - Sigalas, M. / 2005 / Classical Vibrational Modes in Phononic Lattices : Theory and Experiment / Z. Kristallogr 220 : 765 ~ 809
4. [학술지(정기간행물)] - Martinez-Sala, R. / 1995 / Sound Attenuation by Sculpture / Nature 378 : 241 ~
5. [학술지(정기간행물)] - Kushwaha, M. S. / 1997 / Stop-bands for Periodic Metallic Rods: Sculptures that can Filter the Noise / Appl. Phys. Lett 70 : 3218 ~ 3220
2. [학술지(정기간행물)] - Pennec, Y. / 2010 / Two-dimensional Phononic Crystals: Examples and Applications / Surface Science Reports 65 : 229 ~ 291
3. [학술지(정기간행물)] - Sigalas, M. / 2005 / Classical Vibrational Modes in Phononic Lattices : Theory and Experiment / Z. Kristallogr 220 : 765 ~ 809
4. [학술지(정기간행물)] - Martinez-Sala, R. / 1995 / Sound Attenuation by Sculpture / Nature 378 : 241 ~
5. [학술지(정기간행물)] - Kushwaha, M. S. / 1997 / Stop-bands for Periodic Metallic Rods: Sculptures that can Filter the Noise / Appl. Phys. Lett 70 : 3218 ~ 3220
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