Elastic wave modulation of double-leaf ABH beam embedded mass oscillator

We present the double-leaf acoustic black hole beam embedded mass oscillator, and discuss the different elastic waves modulation effects. Vibration transmission spectrum indicates that strong wave trapping region corresponds to the anti-symmetrical vibration attenuation (Fano-like resonance) and the weak wave trapping region corresponds to the symmetrical vibration attenuation (Bragg scattering). The addition of the mass oscillator can affect the band structure of the double-leaf acoustic black hole beam. Furthermore, the attenuation amplitude and bandwidth of flexural and longitudinal waves can be adjusted flexibly. Contrastive vibration experiments verify the proposed double-leaf acoustic black hole beam embedded mass oscillator is effective for vibration isolation, and the relevant conclusions can be used in the vibration reduction design of light structure and enrich the relevant research experience of acoustic black hole.