Info
On behalf of the European Association for the Control of Structures, the organizers of the European conference on structural control and the partners of the SureROB project would like to invite you to attend a talk on "Acoustic Black Holes and Their Applications in Vibration and Noise Reduction".
Acoustic Black Holes and Their Applications in Vibration and Noise Reduction
Prof. Hongli JI and Jinhao QIU, State Key Laboratory of Mechanics and Control of Aerospace Structures, Nanjing University of Aeronautics and Astronautics, China (Short bio here: https://www.researchgate.net/profile/Hongli-Ji)
Abstract
The acoustic black hole (ABH) effect utilizes variations in structural parameters or material properties to reduce wave velocity within a structure. The most common approach to creating an ABH involves tailoring the thickness profile to concentrate energy in specific regions. Owing to their high efficiency, broadband performance, and design flexibility, ABH structures show great promise for vibration and noise reduction in thin-walled systems. This talk reviews recent progress in the modeling, analysis, implementation, and experimental characterization of ABH structures, together with their applications in vibration damping, noise control, and energy harvesting. Modeling approaches include semi-analytical wavelet methods for one-dimensional ABHs, finite element methods for two-dimensional ABHs, and wave field visualization via laser ultrasonics. Implementation strategies such as embedded ABHs and add-on ABH-based dynamic vibration absorbers (ABH-DVAs) are presented. The mechanisms of panel vibration damping through embedded ABHs and ABH-DVAs, cavity noise reduction using ABH panels, and enhanced energy harvesting performance are discussed. Finally, applications of ABH technology to noise and vibration mitigation in high-speed trains and helicopters are highlighted.
Head over to the conference website for more information. We look forward to your attendance!
