透声复合船体板结构的声学性能分析  

Analysis of Acoustic Properties of Sound Transmission Composite Plate Structure

作　　者：艾海峰[1] 陈志坚[1] 

机构地区：[1]海军工程大学船舶与动力学院,武汉430033

出　　处：《噪声与振动控制》2009年第2期80-83,共4页Noise and Vibration Control

摘　　要：建立了垂直入射时复合船体板结构中前行波和回行波声压幅值在层间的传递矩阵,计算了该类复合结构的透声系数,并对典型夹芯板结构进行了分析,指出对于阻抗匹配层要降低材料的损耗因子,而对于阻抗失配层要降低厚度,才能显著提高复合板结构的透声性能,有助于水声复合材料的设计以及声学试验的数值验证。The amplitude transmission matrix of progressive and regressive plane waves between layers is derived for composite plate structure in a normal incidence case. Its transmission coefficient is computed. Then a typical sandwich-plate is analyzed. It is indicated that the transmission coefficient of composite plate structure can be increased if the loss factor of impedance-matching layer or the thickness of impedance-mismatching layer decreases. Discussion in this paper is beneficial for design of hydro-acoustic composite material and numerical verification for acoustic tests.

关 键 词：振动与波 透声性能 衰减系数 复合板结构 

分 类 号：O427.1[理学—声学]