Parametric model order reduction applied to thin-walled structures modified by acoustic black holes

In thin walled structures a smooth reduction of the thickness results in a decreasing propagation speed and an increasing amplitude of the bending wave. Acoustic black holes (ABH) make use of this modulation to enhance the energy dissipation in the vicinity of the ABH. Modifying a thin walled structure with ABH can significantly influence the energy distribution in the structure. For large systems those investigations become computationally expensive. This contribution investigates the influence of the geometric parameter that defines the design of an ABH by using Model Order Reduction (MOR). Several numerical models are evaluated to assess the dependency between the geometric design parameters of the thickness variation and the energy distribution in the structure, the computational time and the quality of the approximation are compared with the solution obtained using the corresponding full-scale FE model.     «

In thin walled structures a smooth reduction of the thickness results in a decreasing propagation speed and an increasing amplitude of the bending wave. Acoustic black holes (ABH) make use of this modulation to enhance the energy dissipation in the vicinity of the ABH. Modifying a thin walled structure with ABH can significantly influence the energy distribution in the structure. For large systems those investigations become computationally expensive. This contribution investigates the influ...     »