The effects of the disordered local resonators on the vibration band-gap characteristics of the elastic metamaterial multi-span beams are investigated and validated by the vibration experiments. Compared with the complete periodic elastic metamaterial multi-span beams, it is demonstrated that the disordered periodic ones can broaden the band-gaps and even generate new local resonance band-gaps. Furthermore, the coupling of the multiple local resonance band-gaps with the Bragg scattering ones can be realized by properly adjusting the difference in the natural frequencies of the disordered local resonators. Consequently, the vibration suppression and noise reduction performance of the elastic metamaterial multi-span beams can be enhanced by a proper disorder design of the resonators.

通过振动实验研究和验证了无序局域谐振器对弹性超材料多跨梁振动带隙特性的影响。与完整的周期性弹性超材料多跨梁相比，无序的周期性梁可以扩大带隙，甚至产生新的局部共振带隙。此外，可以通过适当地调整无序的局部谐振器的固有频率的差来实现多个局部谐振带隙与布拉格散射带隙的耦合。因此，通过适当地设计谐振器，可以提高弹性超材料多跨梁的减振和降噪性能。