倾斜微穿孔板结构的吸声特性研究
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摘要
针对实际应用中空间尺寸的限制和吸声性能的要求,提出倾斜微穿孔板吸声结构。首先,用虚拟的隔板将倾斜微穿孔板吸声结构分成有限个等宽的吸声胞元体,每个吸声胞元体的背衬空腔厚度均不相等。基于马大猷微穿孔理论和声阻抗并联原理,采用传递函数法获得不同穿孔方向倾斜微穿孔板吸声结构的吸声性能表达式。理论计算结果与现有实验测试结论相吻合。结果表明,微穿孔方向对结构吸声性能的影响较明显,适当调整微穿孔方向可获得满意的吸声系数。
In practical application, an inclined micro-perforated panel(IMPP) absorber is introduced to improve sound absorption performance. First, the IMPP absorber can be visualized as a combination of series of the traditional MPP absorbers with a large number of air cavities of different depths. The sound absorption characteristics of the IMPP absorber for different incident angles and perforated direction of perforations are derived, based on the MPP theory and the parallel connection rule of acoustic impedance. In order to verify the theoretical model, the prediction of the model is compared with the existing experimental results. Using the proposed model, the perforated direction of perforations, the inclined angle, and the micro-perforated diameter show great effects on the sound absorption characteristics of the inclined micro-perforated panel absorber.
In practical application, an inclined micro-perforated panel(IMPP) absorber is introduced to improve sound absorption performance. First, the IMPP absorber can be visualized as a combination of series of the traditional MPP absorbers with a large number of air cavities of different depths. The sound absorption characteristics of the IMPP absorber for different incident angles and perforated direction of perforations are derived, based on the MPP theory and the parallel connection rule of acoustic impedance. In order to verify the theoretical model, the prediction of the model is compared with the existing experimental results. Using the proposed model, the perforated direction of perforations, the inclined angle, and the micro-perforated diameter show great effects on the sound absorption characteristics of the inclined micro-perforated panel absorber.
引文
[1]MAA DY,Potential of micro-perforated panel absorber[J].Journal of the Acoustical Society of America,1998,104:2861-2866.
[2]YAIRI M,TAKEBAYASHI K,SAKAGAMI K,et al,Wideband sound absorber obtained by combination of two microperforated panel absorbers with different air-cavity depths arranged in parallel[C].Inter-noise&Noise-con Congress&Conference.2009.
[3]TAN WH,AFENDI M,AHMAD R,et al,Sound absorption analysis on micro-perforated panel sound absorber with multiple size air cavities[J].International Journal of Mechanical&Mechatronics Engineering,2015,15,5:71-76.
[4]卢伟健,张斌,李孝宽.变截面微穿孔板吸声特性研究[J].噪声与振动控制,2009,29(4):147-150.
[5]NING JF,REN SW,ZHAO GP.Acoustic properties of micro-perforated panel absorber having arbitrary crosssectional perforations[J].Applied Acoustics,2016,111:135-142.
[6]胡鹏,赵晓丹.斜置微穿孔板结构声学特性计算与试验研究[J].压电与声光,2013,35,1:38-42.
[7]YANG C,CHENG L,PAN J,Absorption of oblique incidence sound by a finite micro-perforated panel absorber[J].Journal of the Acoustical Society of America,2013,133,1:201-209.
[8]李唐.不等腔微穿孔组合吸声结构的吸声特性初探[D].太原:太原理工大学,2008.
[2]YAIRI M,TAKEBAYASHI K,SAKAGAMI K,et al,Wideband sound absorber obtained by combination of two microperforated panel absorbers with different air-cavity depths arranged in parallel[C].Inter-noise&Noise-con Congress&Conference.2009.
[3]TAN WH,AFENDI M,AHMAD R,et al,Sound absorption analysis on micro-perforated panel sound absorber with multiple size air cavities[J].International Journal of Mechanical&Mechatronics Engineering,2015,15,5:71-76.
[4]卢伟健,张斌,李孝宽.变截面微穿孔板吸声特性研究[J].噪声与振动控制,2009,29(4):147-150.
[5]NING JF,REN SW,ZHAO GP.Acoustic properties of micro-perforated panel absorber having arbitrary crosssectional perforations[J].Applied Acoustics,2016,111:135-142.
[6]胡鹏,赵晓丹.斜置微穿孔板结构声学特性计算与试验研究[J].压电与声光,2013,35,1:38-42.
[7]YANG C,CHENG L,PAN J,Absorption of oblique incidence sound by a finite micro-perforated panel absorber[J].Journal of the Acoustical Society of America,2013,133,1:201-209.
[8]李唐.不等腔微穿孔组合吸声结构的吸声特性初探[D].太原:太原理工大学,2008.