Sharma Gyani Shankar, Marsick Adrien, Maxit Laurent, Skvortsov Alex, MacGillivray Ian, Kessissoglou Nicole
School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia.
Univ Lyon, INSA Lyon, LVA, 25 bis, av. Jean Capelle, F-69621, Villeurbanne Cedex, France.
J Acoust Soc Am. 2021 Dec;150(6):4308. doi: 10.1121/10.0008907.
An analytical framework for sound radiation from a fluid-loaded cylindrical shell covered with an acoustic coating is presented. The coating is composed of a soft elastic material embedded with a circumferential layer of equispaced voids. The layer of voids is modeled as an effective fluid medium sandwiched between two layers of the host material. Expressions for the effective impedance of the coating, radial displacement of the elastic shell, and the structure-borne radiated pressure for harmonic excitation of the shell are derived. Results show that the coating design can be tuned to reduce the radiated sound in a broad frequency range.
提出了一种用于覆盖声学涂层的流体加载圆柱壳声辐射的分析框架。该涂层由嵌入等间距周向空隙层的软弹性材料组成。空隙层被建模为夹在主体材料两层之间的有效流体介质。推导了涂层有效阻抗、弹性壳径向位移以及壳谐波激励下结构声辐射压力的表达式。结果表明，可以调整涂层设计以在很宽的频率范围内降低辐射声。
