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

作     者：Rui Zhao Jian Zheng Jin Guo Yunbo Shi Hengzhen Feng Jun Tang Jun Liu Rui Zhao;Jian Zheng;Jin Guo;Yunbo Shi;Hengzhen Feng;Jun Tang;Jun Liu

作者机构：Science and Technology on Electronic Test&Measurement LaboratoryNorth University of ChinaTaiyuan 030051ShanxiChina School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081China 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2024年第34卷第4期

页      面：217-224页

核心收录：

学科分类：12[管理学] 083002[工学-环境工程] 1204[管理学-公共管理] 120402[管理学-社会医学与卫生事业管理(可授管理学、医学学位)] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 080501[工学-材料物理与化学] 0837[工学-安全科学与工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：National Natural Science Foundation of China(Grant Nos.51821003,52175524,61704158) the Natural Science Foundation of Shanxi Province(Grant No.202103021224206) Shanxi"1331 Project"Key Subjects Construction to provide fund for conducting experiments 

主　　题：Star-shaped metamaterials Broadband Vibration attenuation Low-frequency ultrasound vibration Transmission loss 

摘      要：In order to suppress the low-frequency ultrasound vibration in the broadband range of 20 k Hz—100 k Hz,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 *** effect of the dispersion relation and the bandgap characteristic for the scatterers in star-shaped are simulated and *** target bandgap width is extended by optimizing the geometry parameters of arc and sharp-angle convergent *** 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 of20 k Hz—100 k *** 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 *** 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 highprecise equipment.