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对一维二元(金属-金属型、金属-非金属型、非金属-非金属型)3类声子晶体杆,选择相同的晶格常数0.06m,不同的材料和填充率对其带隙进行计算。结果显示:金属-金属型结构的禁带频率较高,带宽较窄;金属-非金属型结构的带隙频率虽高,但比金属-金属型结构的低,且禁带宽度很大,适宜应用于高频振动控制;非金属-非金属型结构的带隙频率非常低,适宜应用于低频振动控制;当只改变散射体的填充率时,对于一维二元金属-金属型声子晶体与金属-非金属型声子晶体,都会出现第1带隙带宽最大而第2带隙带宽最小的情况。总之,填充率变化对3类不同材料组合类型声子晶体的带隙调控作用明显。
For the one-dimensional binary (metal-metal type, metal-nonmetallic, nonmetallic and nonmetallic) type 3 phononic crystal rod, the same lattice constant of 0.06 m was chosen. The effect of different materials and filling rates on the band gap Calculation. The results show that the band gap of the metal-metal structure is higher and the bandwidth is narrower. The band-gap frequency of the metal-non-metal structure is higher than that of the metal-metal structure, and the bandgap width is large, which is suitable Which is suitable for high-frequency vibration control. The bandgap frequency of non-metallic-non-metallic structure is very low, which is suitable for low-frequency vibration control. When only changing the filling rate of scatterers, one-dimensional binary metal-metal phononic crystals And metal-non-metallic phononic crystals, the bandgap of the first bandgap and the bandgap of the second bandgap will both be the largest. In conclusion, the change of filling rate has obvious effect on the bandgap regulation of phononic crystals of three types of materials.