三维蜂窝状声子晶体的带隙优化研究

蜂窝状的声子晶体具有优秀的减振降噪特性,选择丁腈橡胶作为基底,钢作为散射体,通过构建不同蜂窝状的声子晶体模型以及改变几何材料参数,可以得到更宽的低频带隙,从而得到更好的减振效果。通过COMSOL软件,利用周期性边界条件和布洛赫理论进行建模,计算出其能带结构并和传输特性进行比较,分析了不同结构参数下的位移模式,寻找出最优越的蜂窝状声子晶体,在对带隙范围调控上提出了新的方法和思路。

Optimized Research on the Band Gaps of Three Dimensional Honeycomb Phononic Crystal

Honeycomb phononic crystal has excellent features in reducing noise and vibration. For the crystal with nitrile rubber as the base and steel as the scatterer, a wider frequency band gap and better vibration reduction effect is realized by constructing different honeycomb phononic crystal model and changing the geometric parameters. The model is constructed based on the periodic boundary condition and Bloch theory using COMSOL software. The band structure are calculated and compared with the transport properties. Finally, the most superior honeycomb phononic crystal was found out and a new method to control the band gap was claimed.