Fast multipole BEM for acoustics in automotive applications

You are here: Homepage > Search

Fast multipole BEM for acoustics in automotive applications

Fischer, Matthias / Brunner, Dominik / Junge, Michael / Gaul, Lothar

Numerical simulation is essential for acoustic optimization of products in early development phases. In automotive industry, challenging targets very often require to simulate acoustics on a system level. For example, sound radiation from engine block and oil pan including high frequency excitation by the fuel system. The classical boundary element method (BEM) is not applicable to such large models due to its fully populated matrices. The fast multipole boundary element method reduces the cost of the BEM to quasi-linear in the number of degrees of freedom, allowing simulations with more than 100 k boundary elements on standard desktop computers. In the presented paper, efficiency of the fast multipole boundary element method in combination with a preconditioned iterative solver is ilustrated on the simulation of sound radiation from an engine structure. The boundary element model of the engine is provided by LMS as a real-world benchmark example. The simulations demonstrate the straigt-forward usability of the fast multipole boundary element method to engineering applications.