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一类局域共振型声子晶体梁的带隙分析

DOI: doi:10.3969/j.issn.1007-7043.2011.09.027

Keywords: 局域共振, 声子晶体梁, 带隙, 有限元, 起始频率, 截止频率, 弯曲振动??

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Abstract:

针对局域共振带隙生成机理问题,给出一类由树脂基体、硫化橡胶套和铅套所构成的一维局域共振型声子晶体梁结构,并对其弯曲振动传输特性进行有限元分析,研究带隙起止频率的形成机理,给出相应的简化计算模型.结果表明:该声子晶体梁能够产生低频带隙;带隙的起始频率由局域振子的摆动模式决定,相邻振子间相位排列关系不具有明显的规律性;带隙截止频率由振子和基体的反相位横向弯曲振动模式决定,相邻元胞间呈现出反相关系.

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