With the shift of vehicle manufacturing to rely heavily on a simulated design process, multiple iterations of prototype vehicles are no longer available. Finessing the fine details, such as the tuning of performance audio systems must therefore be completed on fewer vehicle builds as the components, mountings and materials are varied. Adding to this complexity is the reduced duration of the design window as the development time for new vehicles is getting shorter. Design engineers must be as efficient as possible in their efforts and use the best-in-class tools at their disposal; gaining insights earlier into their design process to make informed decisions. This paper will aim to demonstrate an effective workflow for assessing sound system performance in an automotive compartment. This multi-stage novel approach utilizes a finite element method for developing the excitation boundary condition and the discontinuous Galerkin method (DGM) for propagating results within the vehicle cavity. The excitation pattern to be injected into the models will be based on a 1-Dimensional loudspeaker model which directly employs the Thiele and Small parameters of the loudspeaker supplier to transform an input voltage signal into a vibration of the speaker membrane. The final model compares the traditional absorption approach using an impedance boundary condition, to a workflow including 3-Dimentional DGM porous components within the treated cabin. To illustrate the compatibility between DGM techniques and GPU acceleration, a comparison has been performed using a single node with a single GPU that match runtime observed when using several high-performance computing nodes and hundreds of cores.
https://www.aes.org/e-lib/browse.cfm?elib=21820
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