周期复合板的带隙特性和辐射噪声衰减特性分析  

Research on the band gap and attenuation characteristic of sound radiation for periodic compound plate

作　　者：徐青[1] 张俊杰 Xu Wei Zhang Zhifei Yu Lusi Xu Zhongming(School of Automotive Engineering, Chongqing University, Chongqing 400030 Chongqing Automotive Collaborative Innovation Center, Chongqing 400044)

机构地区：[1]中国舰船研究设计中心,武汉430064 [2]船舶振动噪声重点实验室,武汉430064

出　　处：《振动与冲击》2017年第11期188-191,247,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金(51409238;61503354)

摘　　要：对周期复合板的带隙特性和辐射噪声衰减特性进行了研究。运用传递矩阵法建立了周期复合板的运动方程,对于有限周期复合板,将复合板细化为小单元,利用各个单元之间的辐射阻抗,建立了周期复合板的辐射声功率预报模型。数值计算表明,周期复合板辐射噪声存在衰减阻带,在阻带频率范围内的辐射噪声被极大的抑制。研究了复合结构宽度和材料对阻带衰减特性的影响。The band gap and attenuation characteristics of sound radiation for periodic compound plate were investigated. The coupled equations were established by transfer matrix method, and radiation sound was calculated by radiation impedance through meshing the plate into equal squares. Calculations showed that there are stop bands for the radiation sound, and the level of sound radiation is greatly suppressed in the frequency ranges of the stop bands. The influence of the material and geometric parameters on band gap was discussed.

关 键 词：周期复合板 辐射噪声 带隙 传递矩阵 

分 类 号：TB535[理学—物理]