Tech Papers

[50] Using HPC BEM to Resolve Large Wind Noise Problems

The coupled structural-acoustic Boundary Element Method (BEM) has been widely used in vibro-acoustic analysis for decades now, due to its ease of model set up and low dispersion error characteristics. Recently, evolutions of BEM to solve Aero-Vibro-Acoustic (AVA) problems have been
introduced. However, the large-frequency range of excitations, sometimes compounded by the large-size nature of the models at hand implies that such problems have a large number of degrees of freedom. As a consequence, while BEM can provide an accurate solution, the time and memory requirements related to model size and frequency range tend to create practical limitations.
The advent of affordable large-scale distributed memory computing power enables a new generation of BEM solvers to push these limitations away. It enables coupled indirect BEM problems to be solved on large clusters and distribute all CPU-intensive steps on a large number of CPUs. In this paper, the theory behind DMP for BEM will be introduced, and applications to Aero-Vibro-Acoustic will be shown based on work done over several years with a German wind noise workgroup of car manufacturers including Audi, Mercedes, Porsche and Volkswagen.

2015 – DAGA, Nürnberg
Denis Blanchet (ESI Group, Germany)

Download Document