J Shanghai Jiaotong Univ Sci

Journal of shanghai Jiaotong University (Science) ›› 2011, Vol. 16 ›› Issue (6): 750-758.doi: 10.1007/s12204-011-1220-6

• Articles • Previous Articles     Next Articles

Structure-Borne Sound Attenuation at Corner Interface with Dynamic Vibration Absorber Attached

Structure-Borne Sound Attenuation at Corner Interface with Dynamic Vibration Absorber Attached

CHE Chi-dong (车驰东), CHEN Duan-shi (陈端石)   

  1. (State Key Laboratory of Ocean Engineering, School of
    Naval Architecture, Ocean and Civil Engineering,   Shanghai Jiaotong
    University, Shanghai 200040, China)    
  2. (State Key Laboratory of Ocean Engineering, School of
    Naval Architecture, Ocean and Civil Engineering,   Shanghai Jiaotong
    University, Shanghai 200040, China)    
  • Received:2010-07-05 Online:2011-12-30 Published:2012-01-12
  • Contact: CHE Chi-dong (车驰东) E-mail:churchdoor@sjtu.edu.cn

Abstract: Structure-borne sound attenuation at corner interface of two plates with dynamic vibration absorber attached is investigated by wave approach. Equations governing transmission and reflection coefficients are deduced by introducing some non-dimensional coefficients, which help to reveal the physical sense inside and to simplify the analysis. Numerical investigation on vibration energy transmission of bending wave is carried out as well. The results from measurement and prediction show almost the same trends in the simplified experiment. It is found that energy transmission at corner interface depends greatly on whether the dynamic vibration absorber attached acts at resonance and is relatively lower right after the nature frequency of dynamic vibration absorber. Furthermore, the dynamic vibration absorber attached provides less energy transmission of bending wave than blocking mass at the end of ``passing band''.
 

Key words:

structure-borne sound| dynamic vibration absorber| non-dimensional coefficients| wave approach| corner interface

摘要： Structure-borne sound attenuation at corner interface of two plates with dynamic vibration absorber attached is investigated by wave approach. Equations governing transmission and reflection coefficients are deduced by introducing some non-dimensional coefficients, which help to reveal the physical sense inside and to simplify the analysis. Numerical investigation on vibration energy transmission of bending wave is carried out as well. The results from measurement and prediction show almost the same trends in the simplified experiment. It is found that energy transmission at corner interface depends greatly on whether the dynamic vibration absorber attached acts at resonance and is relatively lower right after the nature frequency of dynamic vibration absorber. Furthermore, the dynamic vibration absorber attached provides less energy transmission of bending wave than blocking mass at the end of ``passing band''.
 

关键词:

structure-borne sound| dynamic vibration absorber| non-dimensional coefficients| wave approach| corner interface

CLC Number: