一维声子晶体振动特性与仿真

VIBRATION PROPERTY AND SIMULATION OF ONE DIMENSION PHONONIC CRYSTALS

研究了一维细长杆声子晶体振动特性。利用平面波展开法,计算一维无限周期结构声子晶体的带隙结构,发现每一带隙的宽度与材料的组份比有关。对于有限结构的一维声子晶体,利用MSC/NASTRAN进行防真,仿真结果与实验吻合较好。并通过仿真不同直径的声子晶体研究了横波对带隙的影响。

The vibration property of one dimension thin rod phnoonic crystal is studied. Using the plane wave expansion method, from the computation result for the band gaps structure of infinitd periodic one dimension phononic crystal, it is found the width of the first gap relates with the material portion ratio. The result of the vibration reduction for finite structure is simulated by using MSC/ NASTRAN, which accords well with the experiment one. Moreover, the effect of the transverse wave on the band gaps by changing the phononic crystals diameter.