适于车内噪声控制的二维声子晶体参数的仿真  

Simulation of 2D Phononic Crystals Parameters for In-vehicle Noise Control

作　　者：庄蓓蕾[1] 靳晓雄[1] 仝光[1,2] 何宇漾[1] 

机构地区：[1]同济大学汽车学院,上海201804 [2]上海电机学院汽车学院,上海200245

出　　处：《上海电机学院学报》2010年第5期266-269,275,共5页Journal of Shanghai Dianji University

摘　　要：通过软件仿真的方法,比较二维的布拉格散射型和局域共振型声子晶体,得出局域共振型为适用于控制汽车车内噪声的声子晶体形式,验证了简化模型法的正确性。计算并总结了不同材料密度、拉梅系数、填充率等参数对二维声子晶体带隙的影响,发现增大散射体密度和体积,增大包覆层厚度和降低包覆层材料的拉梅系数是降低局域共振型声子晶体第一禁带起始频率的有效手段。Simulation method is applied to compare propagation of two-dimensional Bragg phononic crystal and the local resonant phononic crystal.Simulation results prove that the local resonant phononic crystals can be used to control vehicle internal noise.Impact of the parameters such as density of materials,lame coefficient and full rate on propagation is analyzed with the simulation method and the simplified model method.Increasing density and volume of the core,increasing thickness of the host and decreasing lame coefficient of the host are effective in reducing the start frequency of local resonant photonic crystals.

关 键 词：声子晶体 车内噪声控制 局域共振 简化模型法 

分 类 号：TB533.2[理学—物理]