首先划分7种类三角晶格声子晶体按三角点阵排列,然后利用平面波展开法计算了类三角晶格钢/环氧声子晶体的反平面模态能带结构,讨论了带隙各向同性和归一化半径对低频带隙的影响.结果表明,类三角晶格钢/环氧声子晶体可以打开不同频率段较宽带隙；选取归一化半径分别为0．34和0．38,使低频带隙得到最大值.这些带隙特征为设计新型减振材料提供了理论依据.
In this paper the seven types of two-dimensional triangle-like lattices are classified by simple triangular lattice.The band gaps of antiplane modes for two-dimensional phononic crystals with triangle-like lattices com-posed of circular steel rods in epoxy are investigated by a plane wave expansion method.The isotropic band gaps and effect of the normalized radius on the band gaps are discussed.The numerical results show that the steel-ep-oxy phononic crystals with triangle-like lattices can open some the wider band gaps in the large frequency ran-ges.The maximum values of the band gaps in the lower frequencies are obtained if choosing the normalized radi-us 0.38 and 0.28.These findings of band gaps would provide the theoretical evidence to design new types of iso-lated materials.
参考文献
| [1] | 肖勇 .局域共振型结构的带隙调控与减振降噪特性研究[D].国防科学技术大学,2012. |
| [2] | Kuang WM;Hou ZL;Liu YY.The effects of shapes and symmetries of scatterers on the phononic band gap in 2D phononic crystals[J].Physics Letters, A,20045/6(5/6):481-490. |
| [3] | Sz-Chin Steven Lin;Tony Jun Huang.Tunable phononic crystals with anisotropic inclusions[J].Physical review, B. Condensed matter and materials physics,201117(17):174303:1-174303:9. |
| [4] | 赵寰宇;骆岩红;陈阿丽.类正方阿基米德格子声子晶体的声学能带结构特性[J].人工晶体学报,2012(1):243-247,252. |
| [5] | 汪静丽;陈鹤鸣.二维棋盘格子复式晶格的完全光子带隙研究[J].物理学报,2007(2):922-926. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%