中文摘要：

以亥姆霍兹共振器为结构单元构建声学超构材料,研究亥姆霍兹共振器开口孔径长度对声学超构材料的谐振频率、吸声性能及负体弹模量的影响.通过传递函数法得到声学超构材料的透射曲线;通过提取参数法得到声学超构材料的有效体弹模量.仿真计算结果表明,声学超构材料的谐振频率随开口孔径长度的增加而降低.通过改变HR的孔径长度,声学超构材料分别实现了中心频率为2 200Hz和1 660 Hz的深度吸声,并在相应频率附近实现了负有效体弹模量.

英文摘要：

A kind of acoustic metamaterial consisting of Helmholtz resonators was fabricated,and the influence of aperture length of Helmholtz resonators on resonant frequency,sound absorption and negative bulk modulus of the acoustic metamaterial were discussed. The transmission curve of metamaterial was obtained by using the transfer function method,and the effective bulk modulus of metamaterial can be obtained by using of the parameter extraction method. The simulation results show that the resonant frequency of acoustic metamaterial decreases with the increasing of aperture length of Helmholtz resonators. Excellent sound absorption appears at the center frequencies 2 220 Hz and 1 660 Hz respectively in the acoustic metamaterial by adjusting the aperture lengths of Helmholtz resonators,and the negative effective bulk modulus is also realized at the corresponding frequencies.