物理学报2012，Vol.61Issue(2)：316-323,8.
0-3型压电复合材料覆盖层水下吸声性能的理论研究
Theoretical analysis of underwater sound absorption of 0-3 type piezoelectric composite coatings
于利刚 1李朝晖 1马黎黎1
作者信息
- 1. 北京大学信息科学技术学院,北京100871
- 折叠
摘要
Abstract
Recently piezoelectric shunt damping has attracted a lot of attention in vibration and noise control.In this article,piezoelectric shunt damping is used in underwater sound absorption in order to enhance the sound absorption of the coating.A one-dimensional electro-acoustic model is established for the calculation by combining the equivalent circuit of thickness mode of a piezoelectric composite coating with the transfer matrix of plane wave propagation.This model can be used to calculate the sound absorption of multiple layers of piezoelectric and non-piezoelectric mediums.Underwater sound absorption of the 0-3 type piezoelectric composite coatings is theoretically analyzed.Elastic,piezoelectric and dielectric constants of the 0-3 type piezoelectric composites are calculated by Furukawa＇s model.Results show that the negative capacitance circuit can adjust the surface acoustic impedance of the piezoelectric composite coating at broadband frequencies.Suitable shunt resistances can make it match the characteristic acoustic impedance of water better.Therefore,the sound absorption can be greatly promoted.关键词
压电分流阻尼/吸声/负电容/0-3型压电复合材料Key words
piezoelectric composite/piezoelectric shunt damping/sound absorption/negative capacitance分类
信息技术与安全科学引用本文复制引用
于利刚,李朝晖,马黎黎..0-3型压电复合材料覆盖层水下吸声性能的理论研究[J].物理学报,2012,61(2):316-323,8.
