摘要
近年来,手性结构因其独特的几何形状和结构性能,而备受关注。Bloch定理被广泛应用于周期结构的研究之中,使用该方法对三韧带手性胞元的能带特性进行分析,并通过对手性结构模型的数值仿真,验证该方法的高效和正确性。结果显示,当振动频率处于结构的带隙范围内时,手性结构具有良好的振动衰减特性。由此进一步对手性胞元的几何形状进行参数研究,分析其对带隙的分布的影响,从而得到结论,适当地选择几何参数可以调节带隙的出现频率。
In recent years,attention is devoted to the chiral structures due to its unique topology and structural properties.In this work,the Bloch theorem and method for the analysis of periodical structures was employed to study the band-gap property of a trigonal chiral structure.A finite element model was built to simulate the structure.Results demonstrate that the vibration transmission displays a significant attenuation for the frequencies located in the band gap.In addition,a parametric study was presented to investigate the dependence of the unit-cell geometry upon the distribution of the band-gap of the structure.It was concluded from the results that reasonable choice of the geometrical parameters can adjust the frequency of band-gap occurrence.
出处
《噪声与振动控制》
CSCD
2013年第4期75-78,共4页
Noise and Vibration Control
关键词
振动与波
三韧带手性结构
BLOCH定理
频散特性
带隙
vibration and wave
trigonal chiral structure
Bloch theorem
dispersion behavior
band gap
