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| Research Progress on Broadband Vibration and Noise Reduction Honeycomb Sandwich Structure Embedded with Local Resonance Unit |
| Received:September 18, 2020 Revised:October 09, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2020.11.015 |
| KeyWord:honeycomb sandwich structure local resonance micro-hole broadband |
| Author | Institution |
| CHEN Yang |
Military Representative Bureau of Naval equipment Department in Guangzhou, Guangzhou , China |
| WU Yong-peng |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| LI Zhong-sheng |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| HUANG An-wei |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| LI Xiao-hui |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| WU Dao-xun |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| SHU Lu |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| HUA Ze-hui |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| DONG Ling-shu |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| SUN Cai-yun |
Southwest Technology and Engineering Research Institute, Chongqing , China |
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| Abstract: |
| In view of the poor effect of traditional honeycomb sandwich structure on middle and low frequency sound waves, a new honeycomb sandwich structure with broadband vibration and noise reduction capability embedded with local resonance unit has been developed in recent years by combining traditional honeycomb sandwich structure with local resonance mechanism. This structure not only uses air medium to generate acoustic-thermal conversion and viscous dissipation, but also adopts the resonance sound absorption mechanism of local resonance unit to attenuate low-frequency sound waves. At the same time, when micro-holes are introduced into the local resonance unit, the acoustic performance of the structure in the middle and low-frequency bands is further improved. The closed cavity of the micro-hole film and honeycomb core will form Helmholtz resonance sound absorber to further absorb low-frequency sound waves. Honeycomb sandwich structure embedded with local resonance unit has excellent broadband acoustic performance, and a wide application prospect in weapons and equipment. |
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