|
|
|
| Acoustic performance of a micro-staggered structure |
| JIANG Congshuang，LI Xianhui，XING Tuo |
| Beijing Key Laboratory of Environment Noise and Vibration, Beijing Municipal Institute of Labor Protection, Beijing 100054, China |
|
|
|
Abstract Now, the theory of micro-perforated plate (MPP) and micro-slitted plate (MSP) is mature and the applications are widespread. However, the theory is constructed based on thin plate, which refines the applications in typical engineering. Micro-staggered structure (MSS) is a combination of MPP and MSP, which is made by overlapping and staggering two layers of plates. Each layer is constituted by arranging an array of strip-shaped sheets separated by a certain space. Micro slits are formed at between those strip-shaped sheets and micro apertures are constructed at intersection of those micro slits. The micro slits are open to the air completely on one side but blocked largely by the sheets on the other side. The micro apertures are just a layer of cross contour taken shape by the two layers of plates and its geometrical thickness equals to zero. Thermoviscous acoustics simulation of MSS is conducted. A good agreement of acoustic impedance and sound absorption coefficient is achieved between simulated results and the experimental data. The simulation shows that the maximum pressure gradient and particle velocities are on the cross contour and the concentration of thermal-viscous energy loss is taking place at the boundary of the cross contour. It also demonstrates the effect of plate thickness on acoustic performance of MSS is much less than that of MPP and MSP, which help to achieve good acoustic properties on a thick plate.
|
|
Received: 20 February 2019
|
|
|
|
[1] 马大猷. 微穿孔板吸声结构的理论和设计[J]. 中国科学，1975, 18(1): 38-50.
Ma Da-You. Theory and design of micro-perforated panel absorber [J]. Science China, 1975, 18(1): 38-50.
2. Maa D. Y. Microperforated-panel wideband absorbers [J]. Noise Control Engineering Journal, 1987, 29(3): 77-84.
3. Maa D. Y. Potential of microperforated panel absorber [J]. Journal of the Acoustical Society of America, 1998, 104(5): 2861-2866.
4. Wu M. Q. Micro-Perforated panels for duct silencing [J]. Noise Control Engineering Journal, 1997, 45(2): 69–77.
5. Kang J., Brocklesby M. W. Feasibility of applying micro-perforated absorbers in acoustic window systems [J]. Applied Acoustics, 2005, 66(6): 669–89.
6. S. Allam and M. Abom, A new type of muffler based on microperforated tubes [J]. Journal of Vibration and Acoustics, 2011, 113(3), 031005.
7. Allam S., Guo Y., and Åbom M. Acoustical Study of Micro- Perforated Plates for Vehicle Applications [J]. SAE Technical Paper 2009-01-2037, 2009.
8. Stinson MR, Champoux Y. Propagation of sound and the assignment of shape factors in model porous materials having simple pore geometries [J]. Journal of the Acoustical Society of American, 1992, 91(2): 685–95.
9. Ning J F, Ren S W, Zhao G P. Acoustic properties of micro-perforated panel absorber having arbitrary cross-sectional perforations [J]. Applied Acoustics, 2016, 111:135-142.
10. 马大猷. 微缝吸声体理论[J]. 声学学报，2000, 25(6): 481-485.
Ma Da-You. Theory of microslit absorbers [J]. Acta Acustica, 2000, 25(6): 481-485.
11. 毛东兴，王佐民. 微缝板结构的吸声理论及类比设计[J]. 同济大学学报，2000, 28(3): 316-319.
Mao D. X., Wang Z. M. Theory and analogous design of microslitted-panel absorbers [J]. Journal of Tongji University 2000, 28(3): 316-319.
12. Randeberg R. T. Adjustable slitted panel absorber [J]. Acta Acust United Acust, 2002, 88: 507-512.
13. Randeberg R. T. Perforated Panel Absorbers with Viscous Energy Dissipation Enhanced by Orifice Design [D]. Trondheim: Norwegian University of Science and Technology, 2000.
14. Auriemma F.. Acosutic performance of micro-grooved elements [J]. Applied Acoustics, 2017, 122: 128-137.
15. Sakagami K., Morimoto M., Yairi M., et al. A pilot study on improving the absorptivity of a thick microperforated panel absorber [J]. Applied Acoustics, 2008, 69(2): 179-182.
16. Gai X. L., Li X. H., Zhang B., et al. Experimental study on sound absorption performance of microperforated panel with membrane cell [J]. Applied Acoustics, 2016, 110: 241-247.
17. Gai X. L., Xing T., Li X. H., et al. Sound absorption of microperforated panel mounted with Helmholtz resonators [J]. Applied Acoustics, 2016, 114: 260-265.
18. 盖晓玲，李贤徽，邢拓，等. L型分割背腔的微穿孔板吸声结构的吸声性能研究[J]. 振动与冲击，2018, 37(6): 256-260.
Gai X. L., Li X. H., Xing T., et al. Sound absorption of microperforated panel backed by an L-type division cavity [J]. Journal of Vibration and Shock, 2018, 37(16): 256-260.
19. Liu J., Herrin D. W. Enhancing micro-perforated panel attenuation by partitioning the adjoining cavity [J]. Applied Acoustics, 2010, 71: 120-127.
20. Toyoda M., Sakagami K., Takahashi D. et al. Effect of a honeycomb on the sound absorption characteristics of panel-type absorbers [J]. Applied Acoustics, 2011, 72: 943-948.
21. 张丰辉，唐宇帆，辛锋先，等. 微穿孔蜂窝－波纹复合声学超材料吸声行为[J]. 物理学报，2018, 67(23): 234302-1－11.
Zhang F. H., Tang Y. F., Xin F. X., et al. Micro-perforated acoustic metamaterial with honeycomb-corrugation hybrid core for broadband frequency sound absorption [J]. Acta Physica Sinica, 2018, 67(23): 234302-1－11.
22. Crandall I. B. Theory of vibrating systems and sound [M]. Van Nostrand, 229, 1926.
23. Ingard U. On the theory and design of acoustic resonators [J]. Journal of the Acoustical Society of America, 1953, 25(6):1037-1061.
24. Rayleigh J. W. S. The Theory of Sound [M]. Volume II, 1940.
25. Ingard U., Ising H.. Acoustic nonlinearity of an orifice [J]. Journal of the Acoustical Society of America, 1967, 42(1): 6-17.
26. Maa D. Y. Microperforated panel at high sound intensity [J]. Acta Acustica 1996, 21(1): 10-14.
27. GB/T 18696.2-2002 《声学 阻抗管中吸声系数和声阻抗的测量 第2部分：传递函数法》[S]. 北京: 中华人民共和国国家质量监督检验检疫总局，2002.
GB/T 18696.2-2002. Acoustics – Determination of sound absorption coefficient and impedance in impedance tubes – Part 2: Transfer-function method [S]. Beijing: AQSIQ, 2002.
28. Liu J., Hua X., Herrin D. W. Estimation of Effective Parameters for Microperforated panel absorbers and applications [J]. Applied Acoustics, 2014, 75: 86-93.
|
|
|
|
