ACOUSTIC PROPERTY OF SLIGHTLY COMPRESSIBLE POROUS MEDIA AND UNDERWATER STRUCTURE-BORNE NOISE REDUCTION

被引：0

作者：

Qin, Bo ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Aerosp Engn, Nanjing 210016, Peoples R China

来源：

PROCEEDINGS OF THE 2012 SYMPOSIUM ON PIEZOELECTRICITY, ACOUSTIC WAVES AND DEVICE APPLICATIONS (SPAWDA12) | 2012年

关键词：

Slightly compressible porous media; Structure-borne noise; Noise reduction;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The weakly compressible viscoelastic medium permeated with micro-bubbles has strong dispersive because of bubbles. The effective sound speed which can be obtained by effective medium method is very small at low frequency range. Based on the acoustic wave equations and boundary conditions, a method is applied to analyze the reduction of underwater structure-borne noise generated by an axially symmetric ring force on the interior of cylindrical shell. The structure-borne noise reduction is simulated for the baffle layer of slightly compressible porous material. The effects of porosity, thickness, damping and shear modulus of matrix are studied. Numerical simulations have confirmed that the underwater structure-borne noise can be reduced effectively by the porous media. This work is helpful for designing the underwater noise control material.

引用

页码：383 / 386

页数：4

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