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Updated user manual for acoustic boundary element solver
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Acoustic solution tools

Predictions of the noise from automotive and aerospace components can be carried out using acoustic solvers, which utilise boundary element methods (BEM) to determine the acoustic propagation of noise.

For more information, the user manual is available through the following link in a compressed PDF format, while a graphical webpage version is available online by clicking on the following image.

Sonitus BE acoustic solver

A custom BEM solver is available for design problems, able to predict the sound pressure (SPL) at a wide range of frequencies of interest. The Sonius BE package is available on both Windows and Linux platforms.

Key features of Sonitus BE:
* Determines complex sound field.
* Internal enclosures or external fields.
* Indirect boundary element solver.
* Coupled structural and acoustic domains.
* Material damping on surfaces.
* Determines frequency response.
* Efficient and flexible solver code.

Whereas finite element modelling involves meshing of a volume, boundary element methods only require meshing of the surface, decreasing solution times.

A surface is generated using design data from any CAD package, then a regular or irregular mesh is applied over this surface, with the node density determined by the excitation frequency of interest. Boundary conditions, in terms of velocities or pressures are applied to the surface. An excitation sound source is located somewhere in the domain, with a prescribed strength.

The solver takes this information and determines the strength of a range of solution functions over the surface. Once the solution is known, the sound pressure at a range of data response locations are calculated.

The Sonitus BE code is a standalone solver, for analysis of the results, Matlab provides a versatile package through a graphical interface. This allows a much greater control over the displaying of the results and integration with other numerical packages.

For licencing, specification and costs, please use the contact button.

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