首页|Suppression of low-frequency ultrasound broadband vibration using star-shaped single-phase metamaterials

Suppression of low-frequency ultrasound broadband vibration using star-shaped single-phase metamaterials

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In order to suppress the low-frequency ultrasound vibration in the broadband range of 20 kHz-100 kHz,this paper proposes and discusses an acoustic metamaterial with low-frequency ultrasound vibration attenuation properties,which is configured by hybrid arc and sharp-angle convergent star-shaped lat-tices.The effect of the dispersion relation and the bandgap characteristic for the scatterers in star-shaped are simulated and analyzed.The target bandgap width is extended by optimizing the geometry pa-rameters of arc and sharp-angle convergent lattices.The proposed metamaterial configured by optimized hybrid lattices exhibits remarkable broad bandgap characteristics by bandgap complementarity,and the simulation results verify a 99％vibration attenuation amplitude can be obtained in the frequency of 20 kHz-100 kHz.After the fabrication of the proposed hybrid configurational star-shaped metamaterial by 3D printing technique,the transmission loss experiments are performed,and the experimental results indicate that the fabricated metamaterial has the characteristics of broadband vibration attenuation and an amplitude greater than 85％attenuation for the target frequency.These results demonstrate that the hybrid configurational star-shaped metamaterials can effectively widen the bandgap and realize high efficiency attenuation,which has capability for the vibration attenuation in the application of high-precise equipment.

Star-shaped metamaterialsBroadbandVibration attenuationLow-frequency ultrasound vibrationTransmission loss

Rui Zhao、Jian Zheng、Jin Guo、Yunbo Shi、Hengzhen Feng、Jun Tang、Jun Liu

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Science and Technology on Electronic Test & Measurement Laboratory,North University of China,Taiyuan 030051,Shanxi,China

School of Mechatronical Engineering,Beijing Institute of Technology,Beijing 100081,China

国家自然科学基金国家自然科学基金国家自然科学基金山西省自然科学基金Shanxi"1331 Project"Key Subjects Construction to provide fund

518210035217552461704158202103021224206

2024

10.1016/j.dt.2023.11.005

防务技术
中国兵工学会

防务技术

CSTPCD
影响因子：0.358
ISSN：2214-9147
年,卷(期)：2024.34(4)