Acoustic performance of piezoelectric acoustic liners with heteromorphic cavity
-
摘要: 为提高压电声衬对低频噪声的抑制范围,对声衬腔体进行结构优化。利用平面波理论构建了两种曲线管道的声学物理模型,并分别建立了两种模型的传递矩阵,以此作为异形腔体亥姆霍兹共振器传递损失计算的理论依据,并通过仿真验证其正确性。结合压电振子的形变对声衬进行有限元仿真分析,结果表明:在压电振子施加500V驱动电压时,两种声衬频率偏移量分别为115Hz和120Hz。与圆柱形腔体声衬进行对比结果表明:在相同腔体厚度范围内,由曲率越大的曲线所生成的腔体,在相同驱动电压条件下,频率变化率越高,这为今后对声衬腔体结构优化提供一种有效的依据。Abstract: In order to improve the suppression range of the low frequency noise of the piezoelectric acoustic liners, the structure of the acoustic liner was optimized. By using the plane wave theory, the acoustic physical model of two kinds of curvilinear channels was constructed, and the transfer matrix of two models was established, which can be used as the theoretical basis for loss calculation of the Helmholtz resonator of the heteromorphic cavity; and the correctness was verified by simulation. Combining the deformation of the piezoelectric oscillator with the finite element simulation analysis of the acoustic liner, the results showed that under the condition of applying 500V driving voltage to the piezoelectric oscillator, the two kinds of acoustic systems were offset by 115Hz and 120Hz, respectively. Compared with cylindrical cavity acoustic liner, the results show that: within the same cavity thickness range, for the cavity generated by the curve of greater curvature under the condition of the same driving voltage, the frequency variation is higher, thus providing an effective basis for the acoustic liner cavity structure optimization.
-
Key words:
- acoustic liner /
- Helmholtz resonator /
- plane wave theory /
- transfer matrix /
- transmission loss
-
[1] HAUFE D,SCHULZ A,BAKE F,et al.Spectral analysis of the flow sound interaction at a bias flow liner[J].Applied Acoustics,2014,81:47-49. [2] ENVIA E,THOMAS R.Emerging community noise reduction approaches[R].AIAA-2011-3532,2011. [3] LU Z B,CUI Y D,DEBIASI M,et al.A tunable dielectric elastomer acoustic absorber[J].Acta Acustica United with Acustica,2015,101(4):863-866. [4] LU Z B,CUI Y D,DEBIASI M.Active membrane-based silencer and its acoustic characteristics[J].Applied Acoustics,2016,111:39-48. [5] LU Z,ZHU J.A novel duct silencer using dielectric elastomer absorbers[J].Proceeding of SPIE,2014,9056:90562N.1-90562N.13. [6] BECK B S,SCHILLER N H,JONES M G.Impedance assessment of a dual-resonance acoustic liner[J].Applied Acoustics,2015,93:15-22. [7] 李春林,赖士洪.风扇进气道胶接蜂窝声衬样件声学性能实验研究[J].航空动力学报,2002,17(1):45-48.LI Chunlin,LAI Shihong.Experimental study on the acoustic of property of bonding honercomb nacell models in compressor inlet[J].Journal of Aerospace Power,2002,17(1):45-48.(in Chinese) [8] 王光发,景晓东,孙晓峰.现场测量管道声衬声阻抗的双传声器法实验研究[J].航空动力学报,2008,23(1):70-74.WANG Gunagfa,JING Xiaodong,SUN Xiaofeng.An experimental investigation of two-microphone method for in situ measurement of the acoustic impedance of a duct liner[J].Journal of Aerospace Power,2008,23(1):70-74.(in Chinese) [9] 靳国永,张洪田,李玩幽,等.基于可调频亥姆霍兹共振器的封闭空间噪声自适应半主动控制[J].声学学报,2010,35(3):309-320.JIN Guoyong,ZHANG Hongtian,LI Wanyou,et al.Adaptive semi-active noise control in enclosure using self-tuning Helmholtz resonators[J].Acta Acustica,2010,35(3):309-320.(in Chinese) [10] 季振林.消声器声学理论与设计[M].北京:科学出版社,2015:51-57. [11] 赵晓臣,柳贡民,张文平.鼓型消声器的声学性能计算与分析[J].振动与冲击,2015,34(17):152-160.ZHAO Xiaochen,LIU Gongmin,ZHANG Wenping.Acoustic attenuation performance of a drumlike silencer[J].Journal of Vibration and Shock,2015,34(17):152-160.(in Chinese) [12] 徐珺,李晓东.高声强下多狭缝共振腔的吸声性能[J].航空动力学报,2016,31(3):548-554.XU Jun,LI Xiaodong.Sound absorption characteristics of resonator with multi slits under high sound pressure level[J].Journal of Aerospace Power,2016,31(3):548-554.(in Chinese) [13] 罗剑.基于MEMS技术的新兴射流技术研究[D].西安:西北工业大学,2010.LUO Jian.Research on new jet technology based on MEMS technology[D].Xian:Northwestern Polytechnical University,2010.(in Chinese) [14] KANG Z X,JI Z L.Acoustic length correction of duct extension into a cylindrical chamber[J].Journal of Sound and Vibration,2008,310(4):782-791. [15] JI Z L,FANG Z.Three-pass perforated tube muffler with end-resonator[J].SAE International Journal of Passenger Cars-Mechanical Systems,2011,4(2):989-999. [16] MUNJAL M L.Acoustics of ducts and mufflers[M].New York:Wiley-Interscience,1987. [17] JI Z L.Acoustic length correction of closed cylindrical side-branched tube[J].Journal of Sound and Vibration,2005,283(3):1180-1186. [18] 康钟绪,郑四发,连小珉,等.膨胀腔消声器声学仿真的一维修正方法[J].声学学报,2011,36(6):652-657.KANG Zhongxu,ZHENG Sifa,LIAN Xiaomin,et al.Corrected one-dimensional approach for the acoustic simulation of expansion chamber silencer[J].Acta Acustica,2011,36(6):652-657.(in Chinese)
点击查看大图
计量
- 文章访问数: 595
- HTML浏览量: 2
- PDF量: 458
- 被引次数: 0