LMS Virtual.Lab Acoustics Pre/Post
The LMS Virtual.Lab Acoustics Pre/Post embeds a full set of pre and postprocessing capabilities for acoustic simulation. It creates a complete acoustic model with the LMS Virtual.Lab Acoustics solvers and enables the user to post-process the model through standard and advanced displays.
In pre-processing mode, one can select the model options: Direct, Indirect BEM or Acoustic FEM; define the acoustic geometry, check the mesh quality and correct where needed. Acoustic properties such as absorbent panels, boundary conditions including vibrating boundary conditions and sources can be defined. Field point grids for results output (microphone locations) can also be generated on various standard shapes (sphere, hemisphere, box, plane…) or by importing from external files.
As for acoustics analysis, one can work through different meshes (e.g. imported from external files). It is possible to verify and solve conflicts inside the model, for example node, element or property number conflicts can be addressed. Basic acoustic mesh creation tools are included as well. For example, the skin creation allows converting a solid structural FEM mesh into a surface acoustic BEM mesh for acoustic analyses.
In post-processing mode, one can deeply examine the results of an acoustic analysis. Standard displays such as 2D displays for sound power (including dB weighting) are supported and provide a basic understanding of the noise issues. These standard displays are complemented by advanced displays such as waterfall and colormap displays for the acoustic radiation of rotating machinery or a given path. Modal and panel contribution displays highlight the most critical radiating parts of a system providing much more insight. In addition to the function displays, a variety of 3D results displays is supported including standard SPL images up to advanced sound directivity and 3D contribution result images. These can be viewed for one specific critical frequency or scrolled through the frequency band of interest.
