Pre/Post
pre- and postprocessor

Chassis System

Advanced pre-/post processer solutions specialized for engine, gearbox, brake system.

The core of the advanced product is a newly developed pre- and postprocessor that allows the reduction of the time spend for finite element modeling. It widely takes over the CAD features, provides a fast meshing by using these features without having the need to clean-up the CAD geometry in a time consuming way. Finally it has comprehensive functionality to build complex assemblies in a very short time in an automated way.

It offers specialised automation functionality for the following applications:

• Structural analysis of powertrain components
• NVH calculations of powertrain components
• Meshing for a CFD analysis
• Modeling of brake systems
• Modeling of turbine components
• AeroLab for modeling of aircraft structures
• Design of experiments (DoE)

This mesh solution is being developed application oriented and provides special features for FE modeling for stress analysis to get to a high quality FE model in a fast and efficient way.

Advantages

For structure

Meshing

• Automatic detection of fillets and cylinders to assign mesh specifications
• Several possibilties for fillet meshing e.g. by defining an aspect ratio
• Specification of a minimum number of elements in a thin wall to get the bending correctly
• Specification of local mesh definitions within a volume using planes, cuboids and cylinders to do for example a local analysis for TMF
• Combined meshes of hexahedral layers (contact areas) and tetrahedral elements

Assembly

• Automatic detection of contact faces with local re-meshing to get coincident nodes and a faster convergence of the solver algorithm.
• Automatic generation of bolts with contact and friction either as MPC´s or hexahedral elements

For NVH

Starting from a CAD model or a fine structural model the bore holes of interest are automatically identified and are preserved together with other relevant areas like ribs to get a good mesh there and the rest of the component is meshed with a coarse mesh.

• Ribs can be added in the FE model without having to go back to the CAD system
• Contacts between components are being generated automatically via templates
• Automatic creation of NVH bolts as MPC´s
• Elimination of overlapping areas and filling of cavities which occure on assembling plastics parts of an intake manifold which is designed for fusion welding
• Generation of a very coarse mesh with the wrapper mesher e.g. for an acoustic analysis.
• Meshing of the cavity between the geoemtry of a component and a surrounding box

For CFD

• Automatic extraction of all adjacent faces
• Meshing of the boundary layer with for example several layers of hexhedral elements
• Filling of the remaining volume with tetrahedral elements.
• Automatically joining the hexahedral and tetrahedral elements

For Brakes

• The brake drum or brake disc is meshed with hexahedral elements in an efficient way
• Creates the contact surfaces with contact properties automatically
• Assures that the nodes in contact areas are coincident
• Connecting holes are being identified automatically and it generates the pre-defined bolts.  
• Due to the process oriented modeling, the meshing and assembly of a brake drum can be done within 4 hours. And it only takes 6 hours for a brake squeal model.
• Large functionality to map temperature and velocity fields and fields of temperature coefficients from one model to the other