科研之友
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摘要
To further explore the absorption mechanism of cavity resonance, the absorption characteristics of anechoic coating embedding elliptic-cylinder cavities with steel plate and air backing were studied. Based on finite element method, the absorption characteristics of both single-cavity coating and mix-cavity coating were obtained respectively. The results show that the anechoic coating embedding elliptic-cylinder cavities has lower resonant frequencies than anechoic coating embedding cylinder cavities under the same perforated rate. And the bigger the oblateness, the lower the resonant frequencies. On the whole, mix-cavity coating has better absorption characteristics at all frequencies.
- 出版日期2012
