Research on structural sound transmission based on acoustic black hole

Abstract:
In this paper, we use a finite element approach to build individual corner coupling plates on COMSOL Multiphysics in combination with conventional wave dampening techniques, to study the vibration of the embedded acoustic black hole coupling plates and the uniform coupling plates in contrast, and to analyze the effect of the coupling plate corner on vibration transfer. Research indicates, when frequencies above 1kHz,At certain parameters of the acoustic black hole structure, an increase in the angle of rotation will lead to an increase in vibration transfer in the structure.Finally, the acoustic black hole structure coupling plate with both blocking mass and damping can further suppress the vibration of the structure.