LMS Virtual.Lab Designer FE Coarsening is a specific modeling solution that is capable of creating a coarsened, regular surface mesh on the basis of a CAD geometry. The software starts with the conversion of the CAD geometry into tessellation triangles, thereby offering the flexibility to adapt the quality of the tessellated mesh. After this, the wrapper creates a regular surface mesh on the envelope of the structure. This surface mesh can then be used for a variety of different simulation applications, including exterior noise (using an acoustic BEM model), CFD and crash. By creating a surface mesh directly on CAD geometry, designers and analysts can avoid the use of structural FEM meshes, which typically only become available much later in the process. Obtaining an acoustic mesh without requiring a structural mesh significantly accelerates the surface meshing process.
In case a structural FEM mesh from CATIA CAE (GPS, FMD, FMS) or from external FE software packages (e.g. Nastran) is available, LMS Virtual.Lab Designer FE Coarsening can create a coarsened surface mesh on the basis of the structural FEM mesh. Coarsened surface meshes, which are used in support of acoustic simulations, typically do not include complex features. Therefore, LMS Virtual.Lab Designer FE Coarsening provides all capabilities to remove unwanted features and optimize the mesh quality.
These revolutionary approaches can be compared to wrapping up a structure with a rubber sheet: the small surface features are smoothened while the features that are responsible for the final response (acoustic or others) remain in place. They also represent efficient solutions, which allow regular coarsened surface meshes to be created in hours instead of weeks, even for very large and complex models to be generated directly on CAD geometry.
