耦合局域共振结构声黑洞梁的减振特性研究  

Research on Vibration Attenuation Characteristics of Acoustic Black Hole Beams Coupled with Locally Resonant Structures

作　　者：李霆锋 赵力 郑伟光 Tingfeng Li;Li Zhao;Weiguang Zheng(Guangxi University of Science and Technology,School of Mechanical and Automotive Engineering,Liuzhou,Guangxi 5456162,China;DongFeng Liuzhou Automobile Co.,Ltd.,Liuzhou,Guangxi 545005,China;Guilin University Of Electronic Technology,Guilin,Guangxi 541004,China)

机构地区：[1]广西科技大学机械与汽车工程学院,广西柳州545616 [2]东风柳汽汽车有限公司,广西柳州545005 [3]桂林电子科技大学,广西桂林541004

出　　处：《产业科技创新》2025年第1期114-118,共5页Industrial Technology Innovation

基　　金：中央引导地方科技发展专项资金(桂科ZY2305501);广西创新驱动发展专项资金项目(桂科AA23062040、2023AA09001);柳州市科技计划项目(2021AAA0104、2022AAA0104);柳东科技项目(20210117);广西交通运输科技推广项目(GXJT-ZDSYS-2023-03-03)资助。

摘　　要：声学黑洞(ABH)因其在振动控制中的显著潜力而备受关注。然而,当入射弯曲波的波长超过ABH特征尺寸时,波难以有效捕获和耗散,从而限制了其在中低频范围的性能。本文提出了一种耦合局域共振结构声学黑洞(LRS-ABH)梁,通过在ABH梁中嵌入局域共振结构。本文采用有限元方法计算无限周期结构的能带特性。同时,计算了有限周期结构的振动传递特性,结果显示其在带隙范围内具有良好的阻尼性能。此外,研究了结构参数以及周期数量对减振特性的影响。结果表明,该设计显著提升了减振性能。本文的研究可以为声学黑洞领域中振动控制的设计提供指导。Acoustic black hole(ABH)has attracted significant attention due to their remarkable potential in vibration control.However,when the wavelength of the incident bending wave exceeds the characteristic size of the ABH,the wave is difficult to be effectively captured and dissipated,which limits its performance in the medium and low frequency range.In this paper,a beam of acoustic black hole coupled with a local resonance structure(LRS-ABH)is proposed by embedding the local resonance structure in the ABH beam.In this paper,the finite element method is used to calculate the bandgap characteristics of the infinite periodic structure.Meanwhile,the vibration transmission characteristics of the finite periodic structure are calculated,and the results show that it has good damping performance within the bandgap range.In addition,the influences of structural parameters and the number of periods on the vibration reduction characteristics are studied.The results show that this design significantly improves the vibration reduction performance.The research in this paper can provide guidance for the design of vibration control in the field of acoustic black holes.

关 键 词：声学黑洞 局域共振 带隙特性 振动衰减 

分 类 号：O424[理学—声学]