| 引用本文: | 王刚,赵宏刚,温激鸿,等.二维周期钢管阵列带隙特性计算中的时域有限差分算法.[J].国防科技大学学报,2004,26(4):72-76.[点击复制] |
| WANG Gang,ZHAO Honggang,WEN Jihong,et al.Finite Difference Time Domain Method for the Study of the Band Gap in the Two-dimensional Rectangular Arrays of the Steel Tubes in Air[J].Journal of National University of Defense Technology,2004,26(4):72-76[点击复制] |
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| 二维周期钢管阵列带隙特性计算中的时域有限差分算法 |
| 王刚, 赵宏刚, 温激鸿, 韩小云 |
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(国防科技大学 机电工程与自动化学院，湖南 长沙 410073)
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| 摘要: |
| 通过选取合适的离散时间间隔，解决了大密度、弹性常数差界面上时域有限差分(FDTD)算法的不稳定现象。进而采用改进的O(2,4)精度FDTD算法，计算了由空气中二维周期钢管正方阵列组成的晶格常数为103mm的声子晶体的Г-Х方向禁带，计算结果与测试结果吻合较好。 |
| 关键词: 声子晶体 声子带隙 时域有限差分 交错网格 |
| DOI： |
| 投稿日期：2004-03-06 |
| 基金项目:国家重点基础研究发展规划资助项目(51307) |
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| Finite Difference Time Domain Method for the Study of the Band Gap in the Two-dimensional Rectangular Arrays of the Steel Tubes in Air |
| WANG Gang, ZHAO Honggang, WEN Jihong, HAN Xiaoyun |
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(College of Mechatronics Engineering and Automation, National Univ.of Defense Technology, Changsha 410073,China)
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| Abstract: |
| By choosing the proper time difference, the algorithmic instability of O(2,4) finite difference time domain (FDTD) method is got rid of in dealing with the crucial distinction of density and elastic constants on interfaces. Using the improved staggered grid FDTD method, we calculated the Г-Х directional band gap of the two-dimensional phononic crystal, which was composed of rectangular arrays of ? 28.5mm steel tubes with lattice constant of 103mm. Calculated results were compared with the measured ones, and both results coincided well. |
| Keywords: phononic crystal phononic band-gap finite difference time domain staggered grid |
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