摘要
设计出基体材料为塑料,散射体材料为铝的一维声子晶体杆状模型,采用集中质量法,仿真计算该模型中散射体铝的材料参数变化时各结构的带隙分布情况,寻找相应的变化规律。研究表明:随着基体材料塑料与散射体材料铝的密度差增大,结构的第1、第2带隙的起始频率逐渐降低,并且第1带隙的带宽随之逐渐增大。同时,散射体材料铝的杨氏模量、剪切模量的变化与结构的第1、第2带隙的截止频率呈正相关关系。增大结构散射体材料的杨氏模量、剪切模量有利于结构获得更大的第2带隙带宽。
The paper designs one-dimensional phonon crystal rods model with plastics as substrate material and aluminum as scattering material and uses simulation calculation to get the band gap distribution when A1 parameters in scattering material change and to look for corresponding change rules using the concentrated quality standard. The research shows that the starting frequency of gap 1 and gap 2 lowers and gap width of gap 1 rises gradually when the density differences between plastics and A1 rises. Meanwhile, the change of Yang modulus and shear modulus in scattering aluminum material and stopping frequency of the structure of gap 1 and 2 are positively correlated. To increase Yang modulus and shear modulus in scattering aluminum material is ~helpful to obtain a larger gap 2 bandwidth.
出处
《文山学院学报》
2014年第3期66-68,共3页
Journal of Wenshan University
基金
国家自然科学基金项目"相干声波的激发和调控"(10664006)
云南省教育厅科研基金项目"一维声子晶体带隙结构计算与应用探讨"(2010Y093)
关键词
一维声子晶体
能带结构
集中质量法
铝
塑料
One-dimensional phonon crystal
band structure
concentration quality approach
aluminum
plastics
