›› 2012, Vol. ›› Issue (06): 1442-1447.

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Analysis of sound-absorbing performance of bionic porous material

WANG Yong-hua1, ZHANG Cheng-chun1, WANG Jing2, SHI Lei1, ZHANG Xue-peng1, REN Lu-quan1   

  1. 1. Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, China;
    2. Teaching Central of Basic Courses, Jilin University, Changchun 130022, China
  • Received:2011-11-10 Online:2012-11-01

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Abstract: Taking the typical porous sound-absorbing material polyurethane as the base material, 3 bionic models were designed based on the multi-level organization structure and morphological characteristics of skin and coverts of the asprey, including the uni-bionic models with trapezoidal ribbed surface or backing cavity, and the dual-bionic coupled model with both features. Refering to the national standard GBT-18696.2-2002 for the measure method of sound-absorbing coefficient by transfer function method in the impedance tube, the sound-absorbing performance(SAP) of the porous polyurethane with different structures were analyzed by the finite element method. The results showed that all the bionic models demonstrate good SAP, in particular, the trapezoidal ribbed surface improves effectively the SAP of material in the intermediate and high frequency bands, the backing cavity improves the low frequency SAP, and the bionic coupled model improves SAP in the whole frequency range.

Key words: engineering bionics, porous material, transfer function method, sound-absorbing coefficient, finite element method(FEM), bionic coupling

CLC Number: 

  • TB17
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