摘要
制备了晶格常数同声波波长同数量级的二维钢/空气体系声子晶体结构模型。研究了在填充分数较小(F<0.082)的情况下,单一方向(ГX)声波在二维声子晶体的声传播特性,得出其禁带频率范围。对1400 Hz-3200 Hz的声波垂直通过管阵列结构模型前后的声压级(SPL)进行了实验测试,多处表现出频段声压的加强与减弱。研究了在管子直径及结构列间距不变的情况下增加排数及改变排间距两种情况下的禁带频率范围,得出了禁带宽度及最大插入损失的位置变化规律。
We have prepared the two-dimension lattice constant have the same size as the sound wave （ F 〈 0. 082 ） , the sound propagation property through steel/air system phononic crystal model, the crystal length. On the condition of the low filling fraction the two-dimension phononic crystal in single direction（FX） is studied, and the band-gap wide range is educed . The sound pressure level （SPL） of the sound wave perpendicular track the steel array structure is measured with in 1 400 Hz to 3 200 Hz. We have studied two types of the band-gap, for one condition is to add the number of the row and the other is to alter the space between rows. We can concluded the rule regarding the width of the band-gap and the location of the maximal insertion loss.
出处
《噪声与振动控制》
CSCD
北大核心
2009年第4期144-147,共4页
Noise and Vibration Control
关键词
振动与波
声子晶体
带隙
平面波法
vibration and wave
phononic crystals
band-gap
plane wave method
