Eventos Anais de eventos
DINAME 2023
XIX International Symposium on Dynamic Problems of Mechanics
Evaluation of wedge-shaped acoustic black holes for vibration damping with different analysis softwares
Submission Author:
Max Käfer , Austria , Austria
Co-Authors:
Max Käfer, Martin Brunner, Anna Lisa Leitold, Fadi Dohnal
Presenter: Max Käfer
doi://10.26678/ABCM.DINAME2023.DIN2023-0007
Abstract
The increasing demand for noise and vibration damping materials in the form of metamaterials also puts acoustic black holes in the focus. A properly designed acoustic black hole achieves localization of vibration energy above a certain cut-on frequency. This enables the reduction of the acoustic radiation of an underlying flexible structure. This work sets up a calculation process for wedge-shaped metamatarials . Parametric studies evaluating natural frequency and modal deflections are carried out for tuning and optimizing the design towards a specific frequency range of operation. Sound radiation and energy flows are calculated for confirming the physical interpretation.
Keywords
acoustic black holes, Acoustic Metamaterial, vibration damping, Acoustics
