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基于椭圆散射体的二维三角晶格声子晶体带隙
  • ISSN号：0254-0037
  • 期刊名称：《北京工业大学学报》
  • 时间：0
  • 分类：O734[理学—晶体学]
  • 作者机构：[1]北京工业大学机械工程及应用电子技术学院,北京100124, [2]山东建筑大学理学院,济南250101
  • 相关基金：国家自然科学基金重点资助项目（10632020）;山东省高等学校科技计划项目（J11LE08）.
作者： 魏瑞菊[1,2], 吴斌[1], 张晓平[2], 赵寰宇[1], 何存富[1]
关键词： 声子晶体, 带隙, 平面波展开法, phononic crystal, band gap, plane wave expansion method
中文摘要：

采用降低对称性改变带隙宽度及位置的思想，以椭圆柱体代替圆柱体构成二维三角晶格钢／空气声子晶体，利用平面波展开法计算其能带结构．结果表明，由于采用椭圆柱体降低了散射体的对称性，从而打开一条新的低频带隙，并且在一定的填充率范围内获得更宽的带隙．此外，散射体截面越接近于圆越容易打开高频带隙；反之，散射体的椭圆截面越扁，越利于打开低频带隙．该研究为声子晶体在低频减振和噪音控制的工程应用方面提供了一种思路．

英文摘要：

Using the symmetry reduction method, elliptical steel cylinders are periodically arrayed in air, which forms the two-dimensional triangular lattice phononic crystal. The band structures are computed by the plane wave expansion （PWE） method. Numerical results show that the degeneracy at high symmetry point of Brillouin zone can be lifted by using elliptical scatters, which lowers the frequency for opening band gaps. Besides, the lower symmetry is, the easier it is to open wide low frequency band gaps. In contrast, the higher it is, the easier it is to open wide high frequency band gaps. These results can be used in industrial design to isolate low frequency noise.

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期刊信息
  • 《北京工业大学学报》
  • 中国科技核心期刊
  • 主管单位:北京市教委
  • 主办单位:北京工业大学
  • 主编：卢振洋
  • 地址：北京市朝阳区平乐园100号
  • 邮编：100124
  • 邮箱：xuebao@bjut.edu.cn
  • 电话：010-67392535
  • 国际标准刊号：ISSN：0254-0037
  • 国内统一刊号：ISSN：11-2286/T
  • 邮发代号:2-86
  • 获奖情况:
  • 中国高等学校自然科学学报优秀学报二等奖,北京市优秀期刊,华北5省市优秀期刊,中国期刊方阵“双效”期刊
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘（网络版）,美国数学评论（网络版）,德国数学文摘,荷兰文摘与引文数据库,美国剑桥科学文摘,英国科学文摘数据库,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,中国北大核心期刊（2000版）
  • 被引量:11924