Design and Research of Dynamic Vibration Absorber Based on Acoustic Characteristics of Interior Sound Field in a Cab
[1]Li Chenyang,Liu Peng,Chen Hong,et al.Design and Research of Dynamic Vibration Absorber Based on Acoustic Characteristics of Interior Sound Field in a Cab[J].Journal of Zhengzhou University (Engineering Science),2021,42(04):47-52.[doi:10.13705/j.issn.1671-6833.2021.04.008]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
42
Number of periods:
2021 04
Page number:
47-52
Column:
Public date:
2021-07-30
- Title:
- Design and Research of Dynamic Vibration Absorber Based on Acoustic Characteristics of Interior Sound Field in a Cab
- Keywords:
- acoustic characteristics; dynamic vibration absorber; finite element method; panel acoustic contribution; orthogonal polynomials method
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2021.04.008
- Abstract:
- To reduce the noise in a cabin and improve the comfort of drivers and passengers,study of reducing the interior noise of the cab was carried out by using dynamic vibration absorbers (DVA).A commercial vehicle cab was simplified.The structure-acoustic coupling model of the simplified cab and its acoustic cavity was established by the finite element method.At first,the sound pressure at the right ear of a driver was predicted,and the frequencies of the highest two pressure peaks were treated as the working frequencies of DVAs.Secondly,the structural panel acoustic pressure contribution at the field point was calculated by the acoustic transfer vector,and the panel with the highest acoustic contribution was treated as the object of the DVA.After then,the equivalent mass of the panel as the object was identified by the orthogonal polynomial method.Finally,the DVA was designed based on the equivalent mass.Compared with using the anti-vibration point as the controlled object of the DVA,using the panel with the highest acoustic contribution as the object of the DVA could reduced the peak sound pressure by 1.46 dB compared with the previous method.Compared with using the mass induction method to determine the equivalent mass of the controlled panel,using the orthogonal polynomial method to determine the equivalent mass could increase the noise reduction rate by 18.9%.According to the acoustic contribution to determine the controlled panel,and the equivalent mass computed by the orthogonal polynomials,this DVA design method could more effectively reduce the noise in the cab.
- References:
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Last Update:
2021-08-26