Model order reduction for the transient vibro-acoustic simulation of acoustic guitars

Element-based modeling techniques such as the finite element method can be used to study the characteristics of a guitar design. While these element-based formulations are versatile enough to accurately describe the complex physical behavior of acoustic guitars, they are also computationally very demanding, especially for transient analysis where the system behavior has to be computed at a very large number of points in time. This paper proposes stability-preserving model order reduction techniques to facilitate the use of finite element models for the transient simulation of acoustic guitars. In this paper a Krylov subspace technique for model order reduction is paired with a fully coupled vibro-acoustic finite element model of a YAMAHA acoustic guitar. The resulting reduced-order model is small yet accurate and stable, and allows for auralization of the sound produced by the guitar model as well as the visualization of the full transient displacement and sound fields.status: publishe