将椭圆钢柱散射体引入到三角晶格固/气型声子晶体中,用平面渡法计算了其带隙结构.研究表明,通过降低散射体横截面的对称度,可在几乎不改变带隙中心频率的条件下获得更宽的低频带隙,还能在极低的填充率下实现低频带隙.随着填充率的增大,带隙变宽,中心频率下降.当散射体绕其中心轴的旋转角度小于60°时,带隙宽度随旋转角度的增大而减小,但带隙中心频率基本不受影响.
参考文献
| [1] | Sigalas M M;Economou E N .Elastic and acoustic wave band structure[J].Journal of Sound and Vibration,1992,158(02):377. |
| [2] | Kushwaha M S et al.Acoustic band'structure of periodic elastic composites[J].Physical Review Letters,1993,71(13):2022. |
| [3] | Liu Z Y;Zhang X X;Mao Y W et al.Locally resonant sonic materials[J].Science,2000,289(08):1734. |
| [4] | Kuang Weimin et al.The effects of shapes and syrnrnetries of scatterers on the phononic band gap in 2D phononic crystals[J].Physics Letters A,2004,332:481. |
| [5] | Li J;Liu ZY;Qiu CY .Negative refraction imaging of solid acoustic waves by two-dimensional three-component phononic crystal[J].Physics Letters, A,2008(21):3861-3867. |
| [6] | Lai Y;Zhang X D;Zhang Z Q .Large sonic band gaps in 12-fold quasicrystals[J].Journal of Applied Physics,2002,91:6191. |
| [7] | Goffaux C.;Vigneron JP. .Theoretical study of a tunable phononic band gap system - art. no. 075118[J].Physical Review.B.Condensed Matter,2001(7):5118-0. |
| [8] | Li X L;Wu F G;Hu H F et al.Large acoustic band gaps created by rotating square rods in two dimensional periodic composites[J].Journal of Physics D:Applied Physics,2003,38:115. |
| [9] | Zhong LH;Wu FG;Zhang X;Zhong HL;Zhong S .Effects of orientation and symmetry of rods on the complete acoustic band gap in two-dimensional periodic solid/gas systems[J].Physics Letters, A,2005(1/2):164-170. |
| [10] | 赵芳,苑立波.二维复式格子声子晶体带隙结构特性[J].物理学报,2005(10):4511-4516. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%