Starting from the vehicle’s computer-aided design (CAD) data, a topological model of the vehicle is created and imported into Autoneum’s REVAMP software. This model is the framework of the Statistical Energy Analysis (SEA) calculation. REVAMP uses this methodology.
The SEA model is a three-dimensional arrangement of entities (panels and cavities) that represent the physical subsystems of the vehicle with associated acoustical properties. These are necessary to evaluate the energy exchange throughout the vehicle.
Apply external loads
For the SEA model to be fully representative of an actual vehicle, external noise impinging on the vehicle under normal driving conditions must be applied.
Additionally, areas where expected leakages may occur (grommets and door seals), are also implemented into the model.
VisualSISAB part performance
By combining the resulting parts performance (calculated with VisualSISAB) with the SEA model, Autoneum can predict the expected Sound Pressure Level (SPL) at various locations inside the vehicle.