Zhao Jing, Ma Zhixin, Hu Yiyang, Zeng Jiacheng, Xu Yuxin, Deng Jie, Gao Nansha
Key Laboratory of Ocean Acoustic and Sensing, School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China.
Key Laboratory of Unmanned Underwater Vehicle, School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China.
Materials (Basel). 2023 Jun 25;16(13):4579. doi: 10.3390/ma16134579.
Acoustic black holes (ABHs) are effective at suppressing vibrations at high frequencies, but their performance at low frequencies is limited. This paper aims to improve the low-frequency performance of ABH plates through the design of a metamaterial acoustic black hole (MMABH) plate. The MMABH plate consists of a double-layer ABH plate with a set of periodic local resonators installed between the layers. The resonators are tuned to the low-frequency peak points of the ABH plate, which are identified using finite element analysis. To dissipate vibration energy, the beams of the resonators are covered with damping layers. A modal analysis of the MMABH plate is performed, confirming its damping effect over a wide frequency band, especially at low frequencies.
声学黑洞（ABHs）在抑制高频振动方面很有效，但它们在低频时的性能有限。本文旨在通过设计一种超材料声学黑洞（MMABH）板来提高ABH板的低频性能。MMABH板由双层ABH板组成，在两层之间安装了一组周期性局部谐振器。谐振器被调谐到ABH板的低频峰值点，这些峰值点通过有限元分析确定。为了耗散振动能量，谐振器的梁上覆盖有阻尼层。对MMABH板进行了模态分析，证实了其在宽频带内的阻尼效果，尤其是在低频时。
