期刊
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
卷 33, 期 4, 页码 532-546出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/1045389X211018841
关键词
Acoustic black hole; ultra-low broadband gaps; multi-objective design; periodic ABHs structure
资金
- National Natural Science Foundation of China [12021002, 11972245]
- Natural Science Foundation of Tianjin City [19JCZDJC38800]
The study investigates the ultra-low frequency broadband gap in a one-dimensional structure embedded with ABHs with power-law material properties, using the Transfer Matrix Method. The results show that the dual power-law ABH structure has excellent ultra-low frequency performance due to the reduction of dual power-law local stiffness. Optimization through parameter analysis and NSGA-II combined with TMM provides a trade-off between lower bandgaps and higher stiffness, leading to the design of periodic DP-ABHs with ultra-low broadband gaps meeting stiffness requirements.
The acoustic black hole (ABH) structure has gradually become a research hotspot in recent years due to its ascendant capacity of vibration attenuation and energy accumulation. To further improve the performance of vibration and noise reduction, the ultra-low frequency broadband gap of a one-dimensional structure embedded ABHs with power-law material properties is investigated in this paper. Based on the Euler-Bernoulli theory, the Transfer Matrix Method (TMM) is used to establish the dynamic model of the dual power-law ABH (DP-ABH) beam. The band structure results obtained by TMM and the finite element method are compared with each other to verify the ultra-low broadband gap of the structure. Comparison with the traditional ABH show that the ultra-low frequency performance of the DP-ABH is due to the enhanced local resonator properties with reduction of dual power-law local stiffness. Parameter analysis served as a guide for optimization is carried out and a method of combining NSGA-II and TMM is applied to optimize the ABH section with full parameters, to consider a trade-off between lower bandgaps and higher stiffness. The investigation shows that the ultra-low broadband gaps of the periodic DP-ABHs structure, which meets adequate stiffness requirements, can be designed by optimized configuration.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据