Simulator predicts low-frequency phenomena

Rayon 2003 is a low-frequency vibroacoustic simulation software package for the prediction of the acoustic performance of manufactured products.

Rayon 2003 is a low-frequency vibroacoustic simulation software package for the prediction of the acoustic performance of manufactured products.

The 2003 release offers two new advanced solvers and full integration with EDS's CAD/CAM solution I-deas ms 10.

The IBEM (inverse boundary element method) solver helps automotive manufacturers analyse and characterise very complex sources such as car engines.

The PEM (poroelastic material) solver addresses the needs of suppliers and OEMs, allowing them to analyse the performance of acoustic components and predict their efficiency in the vehicle environment.

The latest addition to ESI Group's comprehensive suite of virtual prototyping solutions, Rayon 2003 reduces the need for extensive laboratory testing, greatly increases the effectiveness of prototyping and speeds up the product development process.

"To my knowledge, Rayon 2003 is the only software combining boundary element and finite element methods with poroelastic materials.

Therefore, we can model our sound-package components using their intrinsic non-locally-reacting surface impedance matrices, making their integration in the vehicle compartments easier and faster", says Arnaud Duval, CAE Acoustic Group Manager, Faurecia, a worldwide leader in automotive equipment.

"Rayon 2003 is a cost-effective solution to evaluate the performance of fully trimmed vehicles.

We expect to reduce time to market while reaching the stringent quality specifications of the automotive industry".

The new IBEM solver relies on Rayon's boundary element module and a robust inverse algorithm.

Starting from near field acoustic measurements, the solver automatically computes a very accurate equivalent 3D model of any complex source of noise.

The PEM solver explicitly models layered poroelastic materials such as acoustic insulation, barriers and trim materials for any detailed structural-acoustic design or geometry that can be modelled with a finite element mesh.

Starting from the structural finite element model of the vehicle body-in-white, the noise engineer can extend that model with the PEM solver to include absorbing poroelastic components and evaluate their influence and effectiveness on interior sound and on radiated exterior environmental noise Rayon 2003 is available on Windows (NT and XP) and on Unix (HP, IBM, SGI and Sun) workstations and operates in the EDS I-Deas ms10-m1 environment.

Back to top