Topology optimization of constrained layer damping on acoustic black hole structures for vibration reduction

Combining the characteristics of broadband wave aggregation in the acoustic black hole thin- walled structures with the shear deformation of the constrained damping material, a topology layout optimization of the constrained damping material is established. The effective improvement of vibration reduction can be achieved in the whole frequency band after the optimization. Meanwhile, the optimization of the constrained damping material and the weighted processing can improve the vibration reduction in the low-mid frequency range, which is difficult to be solved in the acoustic black hole thin-walled structure vibration reduction application before. The optimization provides effective theoretical and practical value for broadband vibration reduction in the acoustic black hole structures.