双层板内插微穿孔板的隔声性能
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摘要
提出一个在双层板内插入微穿孔板的隔音结构,微穿孔板与双层板平行,把双层板间的腔体一分为二.对结构建立全耦合的数值模型,微穿孔板与双层板均为有限大板,考虑边界条件,计算得到结构的声传播损失.通过实验对所建立的全耦合数值模型进行验证,计算结果与实验结果符合较好.对微穿孔板的位置、穿孔率、板厚以及微孔孔径进行数值计算研究.计算结果表明:相对传统的双层板或者无微穿孔板的三层板结构,内插了微穿孔板的双层板结构在低频的声传播损失效率有所提高;通过适当的微穿孔板参数设置,该结构可以在低频达到较好的隔声效果.
An acoustic insulation structure where a micro perforated plate was inserted into a double-layer plate was proposed.The micro perforated plate was parallel to the double-layer plate,and the cavity between the double plates was divided into two.A fully-coupled numerical model was established for the structure.Micro-perforated plates and double-layer plates were considered to be finite extended.Considering the boundary conditions,the acoustic transmission loss of the structure was calculated.For the established fully-coupled numerical model,the model was validated by experimental methods,and result indicates that a reasonably good agreement between theory and measurement can be achieved.Numerical calculations of the position of the micro perforated plate,the perforation ratio,the plate thickness,and the hole diameter were performed.Results show that compared with the traditional double-layer plate or the three-layer plate structure without micro-perforation plate,the sound transmission loss of the double-layer plate structure with the micro-perforated plate is improved.With proper parameter settings,the structure can also achieve better sound insulation effect at low frequency.
An acoustic insulation structure where a micro perforated plate was inserted into a double-layer plate was proposed.The micro perforated plate was parallel to the double-layer plate,and the cavity between the double plates was divided into two.A fully-coupled numerical model was established for the structure.Micro-perforated plates and double-layer plates were considered to be finite extended.Considering the boundary conditions,the acoustic transmission loss of the structure was calculated.For the established fully-coupled numerical model,the model was validated by experimental methods,and result indicates that a reasonably good agreement between theory and measurement can be achieved.Numerical calculations of the position of the micro perforated plate,the perforation ratio,the plate thickness,and the hole diameter were performed.Results show that compared with the traditional double-layer plate or the three-layer plate structure without micro-perforation plate,the sound transmission loss of the double-layer plate structure with the micro-perforated plate is improved.With proper parameter settings,the structure can also achieve better sound insulation effect at low frequency.
引文
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[14]Wang C,Huang L.On the acoustic properties of parallel arrangement of multiple micro-perforated panel absorbers with different cavity depths[J].The Journal of the Acoustical Society of America,2011,130(1):208-218.
[15]Takahashi D,Tanaka M.Flexural vibration of perforated plates and porous elastic materials under acoustic loading[J].The Journal of the Acoustical Society of America,2002,112(4):1456-1464.
[16]Bravo T,Maury C,Pinhede C.Sound absorption and transmission through flexible micro-perforated panels backed by an air layer and a thin plate[J].The Journal of the Acoustical Society of America,2012,131(5):3853-3863.
[17]Xin F X,Lu T J,Chen C Q.Vibroacoustic behavior of clamp mounted double-panel partition with enclosure air cavity[J].The Journal of the Acoustical Society of America,2008,124(6):3604-3612.
[18]Putra A,Thompson D J.Sound radiation from perforated plates[J].Journal of Sound and Vibration,2010,329(20):4227-4250.
[2]Xin F X,Lu T J.Analytical and experimental investigation on transmission loss of clamped double panels:implication of boundary effects[J].The Journal of the Acoustical Society of America,2009,125(3):1506-1517.
[3]Chazot J D,Guyader J L.Prediction of transmission loss of double panels with a patch-mobility method[J].The Journal of the Acoustical Society of America,2007,121(1):267-278.
[4]Chazot J D,Guyader J L.Transmission loss of double panels filled with porogranular materials[J].The Journal of the Acoustical Society of America,2009,126(6):3040-3048.
[5]Liu Y,Daudin C.Analytical modelling of sound transmission through finite clamped double-wall sandwich panels lined with poroelastic materials[J].Composite Structures,2017,172:359-373.
[6]Liu Y,H C.Diffuse field sound transmission through sandwich composite cylindrical shells with poroelastic core and external mean flow[J].Composite Structures,2016,135:383-396,317-347.
[7]Zhou J,Bhaskar A,Zhang X.Optimization for sound transmission through a double-wall panel[J].Applied Acoustics,2013,74(12):1422-1428.
[8]Falsaf I,Ohadi A.Design guide of single layer micro perforated panel absorber with uniform air gap[J].Applied Acoustics,2017,126:48-57.
[9]Omrani A,Tawfiq I.Vibro-acoustic analysis of microperforated sandwich structure used in space craft industry[J].Mechanical Systems and Signal Processing,2011,25(2):657-666.
[10]Bravo T,Maury C,Pinhede C.Enhancing sound absorption and transmission through flexible multi-layer micro-perforated structures[J].The Journal of the Acoustical Society of America,2013,134(5):3663-3673.
[11]Qian Y J,Kong D Y,Liu S M,et al.Investigation on micro-perforated panel absorber with ultra-micro perforations[J].Applied Acoustics,2013,74(7):931-935.
[12]Yang C,Cheng L,Pan J.Absorption of oblique incidence sound by a finite micro-perforated panel absorber[J].The Journal of the Acoustical Society of America,2013,133(1):201-209.
[13]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.
[14]Wang C,Huang L.On the acoustic properties of parallel arrangement of multiple micro-perforated panel absorbers with different cavity depths[J].The Journal of the Acoustical Society of America,2011,130(1):208-218.
[15]Takahashi D,Tanaka M.Flexural vibration of perforated plates and porous elastic materials under acoustic loading[J].The Journal of the Acoustical Society of America,2002,112(4):1456-1464.
[16]Bravo T,Maury C,Pinhede C.Sound absorption and transmission through flexible micro-perforated panels backed by an air layer and a thin plate[J].The Journal of the Acoustical Society of America,2012,131(5):3853-3863.
[17]Xin F X,Lu T J,Chen C Q.Vibroacoustic behavior of clamp mounted double-panel partition with enclosure air cavity[J].The Journal of the Acoustical Society of America,2008,124(6):3604-3612.
[18]Putra A,Thompson D J.Sound radiation from perforated plates[J].Journal of Sound and Vibration,2010,329(20):4227-4250.