Parallel time-domain simulations for vibro-acoustics using Krylov subspace projections and linear-phase filters

As the interest for time-domain auralization, model based virtual sensing and active noise control increases, so does the need for accurate and fast numerical simulation techniques for vibro-acoustics. The finite element method is well-established as an accurate and versatile tool for the simulation of sound and vibrations in complex structures, but the resulting models can be large in size and typically require too much computational load for these applications. This work proposes a novel method that combines the use of Krylov subspace projection techniques and linear-phase filters to obtain a set of very compact time-domain models that, when combined, accurately model the behavior of the original finite element model. These models are completely independent of one another and can be simulated in parallel. The proposed method therefore effectively enables parallel time-domain simulation for vibro-acoustic finite element models. Not only does this speed up computations, it also allows for separation between the slow and fast dynamics of the system. This can have additional benefits for simulation, virtual sensing and control.status: accepte