Analysis of the anechoic properties of viscoelastic coatings with periodically distributed cavities

作者：Zhao Hong Gang^*; Liu Yao Zong; Wen Ji Hong; Yu Dian Long; Wen Xi Sen

来源：Acta Physica Sinica, 2007, 56(8): 4700-4707.

• Mie scattering
• multiple-scattering
• anechoic material
• phononic crystal

Using an exact Mie scattering solution, the scattering and vibration mode of a single air sphere in unbounded rubber are analyzed with reference to the elements of the scattering matrix. Then, using the multiple-scattering method, the anechoic properties of the viscoelastic rubber coating (with a thickness of 8 mm) containing a plane of periodically distributed air spheres are investigated under different backing conditions. The results show that the excellent anechoic performance of the coating originates from the dilatational resonance of each air sphere. The anechoic coating can attenuate most incident energy and minimize reflection in the resonance frequency region. Finally, a bi-layer coating (with a thickness of 20 mm) is designed for broad-band anecboic material.

• 出版日期2007-8
• 单位中国人民解放军国防科学技术大学