339 / 2021-06-30 20:00:07

Vibration Absorber using Integrated Acoustic Black Holes

Integrated acoustic black holes,Gaussian expansion method,Rayleigh Ritz method,Artificial springs

Special Sessions > Acoustic black hole and vibro-acoustic coupling

Embedded acoustic black holes (EABHs) have been extensively studied in the last decades, however, usually it is prohibitive to alter the thickness of the host structure owing to rigidity limitations in most circumstances. Therefore, it is urgent to take another route of using them. In the present paper, the concept of integrated acoustic black holes (IABHs) are employed for the purpose of exploiting the ABH effect via attaching IABHs, rather than via embedding them. As the research for IABHs is still in its preliminary stage, IABH effects are characterized through Gaussian expansion in the framework of Rayleigh-Ritz method. In particular, the coupling effects of the host structure and the IABH are accounted on by taking the advantage of artificial springs. Results show that the IABHs are very effective once the IABHs are properly placed in structures.