噪声与振动控制2018，Vol.38Issue(z1)：66-70,5.DOI:10.3969/j.issn.1006-1355.2018.Z1.013
声学黑洞梁的振动能量分布探讨
Exploration of Energy Distribution in Acoustic Black Hole Beams
摘要
Abstract
Acoustic black hole (ABH) effect can be achieved by reducing the thickness of structures or gradually changing material properties. The ABH causes the bending wave velocity to decrease gradually and approach zero. Finally, the bending wave is completely absorbed by the ABH. In this paper, the semi-analytical model of one-dimensional ABH beam was established in the perspective of energy. Then, the model was solved numerically with Morlet wavelet as the vibration mode shape function and the energy density distribution was analyzed. The results show that the energy density of the black hole segment is much greater than that of the uniform segment, and the tip portion plays a key role for the acoustic black hole effect. This article provides a reference for the field of vibration control and energy recovery of beam structures.关键词
声学/声学黑洞/振动/弯曲波/半解析法/能量吸收Key words
acoustics/acoustic black hole (ABH)/bending wave/semi-analytical method/energy absorption分类
数理科学引用本文复制引用
邓杰,郑玲,左益芳,曾鹏云,吴行..声学黑洞梁的振动能量分布探讨[J].噪声与振动控制,2018,38(z1):66-70,5.基金项目
国家重点研发计划资助项目(2016YFB0100904, 2017YFB0102603) （2016YFB0100904, 2017YFB0102603）
重庆市重点产业共性关键技术创新专项资助项目(cstc2015jcyjBX0097 （）
csts2015zdcy-ztzx30001) （）
