span style="font-size:10.0pt;font-family:" times="" new="" roman","serif";="" mso-fareast-font-family:"times="" roman";mso-bidi-font-family:mangal;="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-US"The band gap properties span style="font-size:10.0pt;font-family:" times="" new="" roman","serif";="" mso-fareast-font-family:"times="" roman";mso-bidi-font-family:mangal;="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-US"in a
novel two-dimensional phononic crystal with Jerusalem cross slot structures
have been investigated theoretically in the present paper. The dispersion
relations, the power transmission spectra and the displacement fields of the
eigenmodes are calculated by using the finite element method. Numerical
results show that the proposed structures with periodic Jerusalem cross slots
can yield large band gaps in the low-frequency range as compared to the typical
phononic crystals composed of periodic square rods embedded in a homogenous
matrix. The formation mechanisms of the large low-frequency band
gaps as well as the effects of the geometrical parameters on the band gaps are
further explored numerically. Results show that the openings of the
low-frequency band gaps are mainly attributed to the interaction between the
local resonances of the square scatterers with Jerusalem cross slot structures
and the traveling wave modes in the matrix. The band gaps can be significantly
modulated by changing the geometrical parameters of Jerusalem cross slot
structures./span/span
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机译:style =“ font-size:10.0pt; font-family:” times =“” new =“”罗马“,” serif“; =”“ mso-fareast-font-family:” times =“”罗马“ ; mso-bidi-font-family:mangal; =“” mso-ansi-language:en-us; mso-fareast-language:en-us; mso-bidi-language:hi“ =”“ lang =” EN- US“>带隙属性 style =” font-size:10.0pt; font-family:“ times =”“ new =”“罗马”,“ serif”; =“” mso-fareast-font-family: “ times =”“罗马”; mso-bidi-font-family:mangal; =“” mso-ansi-language:en-us; mso-fareast-language:en-us; mso-bidi-language:hi“ = “” lang =“ EN-US”>具有耶路撒冷十字槽结构的新型二维声子晶体本文已进行了理论上的研究。分散的关系,功率传输谱和位移场本征模是使用有限元方法计算的。数值型结果表明,拟议的具有周期性耶路撒冷十字槽的结构与典型的相比,可以在低频范围内产生较大的带隙由嵌入均质的周期性方棒组成的声子晶体矩阵。低频带的形成机理间隙以及几何参数对带隙的影响为在数值上进一步探索。结果表明,低频带隙主要归因于耶路撒冷十字槽结构对方形散射体的局部共振以及矩阵中的行波模式。带隙可能很大通过更改耶路撒冷十字槽的几何参数进行调制结构。 span> span>
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