文章摘要
Study on Optimization of Acoustic Parameters Based on H-N Model of Viscoelastic Material
Received:June 17, 2019  Revised:June 17, 2019
DOI：10.12136/j.issn.1000-890X.2020.06.0423
Key Words: viscoelastic material；H-N model；acoustic parameter；sound absorption performance；sound insulation performance；finite element analysis
Author NameAffiliationE-mail
LI Yu* Luoyang Ship Materials Research Institute ayijiangchunshui@126.com 
WANG Peng Luoyang Ship Materials Research Institute  
WANG Bing Luoyang Ship Materials Research Institute  
CHENG Wei Luoyang Ship Materials Research Institute  
LI Hongwei Luoyang Ship Materials Research Institute  
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Abstract:
      The acoustic model（H-N model） of viscoelastic materials was established by using finite element software. The influence of the acoustic parameters in H-N model on the sound absorption and sound insulation performance of viscoelastic materials in a wide frequency range （300～20 000 Hz） was studied. The results showed that with the increase of the parameter（α） related to the loss peak width，the sound absorption performance and sound insulation performance of the material increased first and then decreased.When α was 0. 35 and 0. 2，the sound absorption performance and sound insulation performance of the material were the best，respectively. With the increase of the parameter（β） related to the loss peak symmetry and the modulus of the glassy platform area（E∞） at the high frequency end，the sound insulation performance of the material decreased，and the sound absorption performance increased first and then decreased. When β was 0. 2 and E∞ was 100 MPa，the sound absorption performance of the material was the best. With the increase of the modulus of rubbery platform（E0） at low frequency end and the relaxation time（t） related to temperature，the sound absorption performance and sound insulation performance of the material decreased.The results could provide an acoustic theoretical basis for the formulation design of viscoelastic materials in wide frequency bands.
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