Innovative Honeycomb Design for Low Frequency Applications

This work is centered on the development of a novel honeycomb structure configuration that is industrially viable, aiming to create absorbers with classical mechanical properties inherent to sandwich structures. The objective is to achieve improved sound absorption performance at lower operating frequencies than currently attainable. The reference case for this study is the sandwich panels utilized in the construction of liners, featuring a rigid plate at the bottom, a honeycomb core, and a microperforated panel as the upper skin to facilitate interaction with disturbances.In order to ensure the comparability of the proposed configuration with commercially available counterparts, the external macro geometry of the panel remains consistent. Notable variations, as illustrated in the presented models, are confined to the internal structure of the honeycomb. To validate the numerical results obtained thus far and to explore the implications arising from the reduction in the number of inlet holes characteristic of this new structure, experimental tests are planned. These tests will serve to corroborate the numerical findings and contribute to a comprehensive understanding of the performance of this innovative honeycomb configuration