Efficient Modeling of Multimode Guided Acoustic Wave Propagation in Deformed Pipelines by Hierarchical Model Reduction
Thursday 1st July 2021
Gentili, G.G.; Khosronejad, M.; Bernasconi, G.; Perotto, S.; Micheletti, S.
The finite element based hierarchical model (HiMod) reduction technique is here applied, for the first time, to model guided acoustic wave propagation in deformed pipelines in a linear regime. This method turns out to be extremely efficient to discretize the linearized Helmholtz equation for acoustic waves. The selection of a suitable modal transverse basis for the acoustic field allows us to speed up the computation by orders of magnitude with respect to a standard 3D finite element discretization.