Structure-borne sound attenuation at corner interface with dynamic vibration absorber attached |
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Authors: | Chi-dong Che Duan-shi Chen |
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Institution: | State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200040, China |
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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”. |
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Keywords: | |
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