首页|双层超材料板的带隙特征与隔声性能研究

双层超材料板的带隙特征与隔声性能研究

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通过设计槽形双环共振单元,构造正方点阵、三角点阵双层超材料板,采用有限元法计算他们的弯曲波低频带隙,而局域共振产生负的动态质量密度的频率段与带隙很好地吻合.对于相同晶格常数和材料组分条件下,在弯曲波带隙频率范围分析正方点阵、三角点阵双层超材料板的双环旋转角β、声波入射角θ对隔声量STL的影响.与常见同质量均质双层板比较,这种新型双层超材料板具有频率低、结构简单、体积小等优点,在减振降噪工程领域有着广阔应用前景.
Study on Bandgaps and Sound Insulation Properties of Metamaterial Bipanel
By designing dual-ring resonance units,the metamaterial bipanels with square and triangular lattices are constructed.Their low-frequency bandgaps of flexural waves are calculated by using the finite element method.The results show that the frequency range of negative dynamic mass density caused from the local resonance is in a good agreement with that of the bandgap.Under the same lattice constant and material component conditions,the effects of rotation angle β of dual-ring and the acoustic wave incidence angle θ on the sound transmission loss are analyzed in the bandgap range of flexural wave for the metamaterial bipanels with the square and triangular lattices.Compared with the traditional homogeneous bipanels with the same mass,these new metamaterial bipanels have the advantages of low frequency,simple structure and small size,which have a wide application prospect in vibration and noise control.

acousticsmetamaterial bipanelflexural wavelow frequency bandgapdifferent latticesound insulation

刘兵飞、郝杨杰、赵寰宇、肖伟民、盖晓玲、骆岩红

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中国民航大学 航空工程学院,天津 300300

内蒙古工业大学 理学院力学系,呼和浩特 010051

北京交通大学 工程力学研究所,北京 100044

北京市科学技术研究院 城市安全与环境科学研究所,北京 100052

西北民族大学 电气工程学院,兰州 730030

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声学 双层超材料板 弯曲波 低频带隙 点阵类型 隔声特性

中央高校基本科研业务费专项资金资助项目天津市自然科学基金资助项目国家自然科学基金资助项目国家电网科技基金资助项目

3192017001121JCYBJC00750113020215500-202058312A-0-0-00

2024

10.3969/j.issn.1006-1355.2024.04.042

噪声与振动控制
中国声学学会

噪声与振动控制

CSTPCD北大核心
影响因子：0.622
ISSN：1006-1355
年,卷(期)：2024.44(4)
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