应用声学
應用聲學
응용성학
APPLIED ACOUSTICS
2010年
3期
212-216
,共5页
雷实建%吴利华%颜琳%赵鹤平
雷實建%吳利華%顏琳%趙鶴平
뢰실건%오리화%안림%조학평
平板二维声子晶体%超元胞法%带隙%能带结构
平闆二維聲子晶體%超元胞法%帶隙%能帶結構
평판이유성자정체%초원포법%대극%능대결구
Two-dimensional phononic crystal slab%Supercell method%Band gap%Band structure
利用超元胞法,研究由钢板上生长有限长度的钢柱体形成的散射体嵌入环氧树脂基体中所构成的平板二维声子晶体的声波能带结构,分析散射体的几何参数如柱体的高、半径和板的厚度对声波带隙的影响.研究结果表明:(1)这种新型的声子晶体具有很宽的带隙,且带隙出现在低频范围内;(2)散射体的几何参数对带隙的宽度有很大的影响,它们是控制带隙宽度的主要因素.
利用超元胞法,研究由鋼闆上生長有限長度的鋼柱體形成的散射體嵌入環氧樹脂基體中所構成的平闆二維聲子晶體的聲波能帶結構,分析散射體的幾何參數如柱體的高、半徑和闆的厚度對聲波帶隙的影響.研究結果錶明:(1)這種新型的聲子晶體具有很寬的帶隙,且帶隙齣現在低頻範圍內;(2)散射體的幾何參數對帶隙的寬度有很大的影響,它們是控製帶隙寬度的主要因素.
이용초원포법,연구유강판상생장유한장도적강주체형성적산사체감입배양수지기체중소구성적평판이유성자정체적성파능대결구,분석산사체적궤하삼수여주체적고、반경화판적후도대성파대극적영향.연구결과표명:(1)저충신형적성자정체구유흔관적대극,차대극출현재저빈범위내;(2)산사체적궤하삼수대대극적관도유흔대적영향,타문시공제대극관도적주요인소.
By using the supercell method, the acoustic wave band structure of two-dimensional phononic crystal slab is investigated.The two-dimensional phononic crystal slab consists of steel cylinders implanted in a steel plate embedded in epoxy where the length of the steel cylinders is limited.The influence of the geometric parameters of the scatterer (the thickness of the slab, the radius and height of the cylinder) on the band structure is analyzed.Our calculated results indicate that this kind of phononic crystal there exist widen band gap and the band gap appear in low frequency range.We also find that the geometric parameters of the scatterer have great effects on the gap widthes and they are the main factors to control the latter.
