中文摘要：

五零能模式材料是一类人工超材料,在隐声斗篷和声透镜制作等领域具有巨大的前景,因而受到广泛关注。针对一种五零能模式材料单胞构型,利用有限单元法分析了该单胞在低频范围内的频散特性,并与准静态分析结果进行对比,两者计算结果基本一致。同时,探讨了单胞内圆台长度和立方体边长的长度分别对该材料波速的影响规律,结果表明这两种结构参数的增大均能提高材料的波速比和等效弹性模量之比。

英文摘要：

Pentamode metamaterials are a class of artificial metamaterials. It attracts more attentions because it can be used to manufacture acoustic cloak and lens with great prospect. Finite element method is used to analyze the dispersion characteristics of a unit cell structure of pentamode metamaterials in low frequency range. And the results are basically consistent with those calculated by quasi-static methods. Meanwhile, we discuss the influences of the length of truncated cones and the edge length of cubes in the unit cell on wave velocity, respectively. The researches show that the ratio of wave velocity and equivalent elastic modulus become greater as increasing the two length parameters, respectively.