SIDACT GmbH

Simulation Data Analysis and Compression Technologies


Improve Robustness Of Crash Simulation Models

Challenge

For the design and optimization of car models it is very helpful to deal with a simulation model, which generates similar results even if slight changes of the model are performed.


The keyword here is predictability. In crash simulations however, quite often there are large deviations among the calculated results. These deviations are caused by instabilities within the model. Those can be of physical nature like buckling or contact/non-contact issues as well as numerically driven.


Both physical instabilities in automotive design and numerical instabilities in simulation packages often cause extremely sensitive dependencies of simulation results.

Solution

DIFFCRASH therefore was developed to encounter these problems and deliver a CAE tool which makes it possible to find the critical/sensitive regions, derive design suggestions and thus lead to a more robust model.

Focussing: Analysing a set of simulation runs DIFFCRASH with its advanced data reduction methods allows the focus on the most important crash events

Better Understanding: Highlighting structures with high variations and visualizing scatter modes the engineer gets a deeoer understanding about the crash behaviour

Improve stability: Finding parts which strongly determine the scatter at other parts allows to derive appropriate design adaptations

Example Workflow

Improve Model Stability

Specialized to analyse a set of simulation runs, DIFFCRASH delivers a unique combination to perform robustness analysis. The statistical methods deliver several fringe plots as a result to easily be able to judge whether or not there is strong scatter occurrence among the simulation results. Combined with the powerful dimension reduction algorithm the cnalysis can then be pushed further to track down root causes, wherethe scatter originates. With this knowledge the engineer is able to derive design suggestions.

Key Features

  • Understand scatter propagation
  • Understand structure of scatter
  • Investigate causal chains
  • Find root causes for scatter
  • Derive design refinements

Seamless Process Integration

HPC

DIFFCRASH does not alter existing workflows while providing the benefits of automatic and interactive scatter investigation.

Workstation

DIFFCRASH is made to fit into the workflow used by engineers. The support of several Post-Processors (GNS Animator, Arup D3PLOT, Altai HyperWorks, Beta Metapost) with a DIFFCRASH plugin allows to interactively perform phase 2 and let the engineer work within his familiar environment.

News

24.08.2018
FEMZIP-N v1.7.2 and FEMUNZIP-N v1.7.11 were released
03.08.2018
SIDACT at 6th OpenFOAM Conference in Hamburg, 23rd to 25th of October 2018.
03.08.2018
SIDACT at 36th CADFEM ANSYS Simulation Conference in Leipzig, 10th to 12th of October 2018.
03.08.2018
SIDACT at German LS-DYNA Forum 2018, 15th to 17th of October 2018.
03.08.2018
DIFFCRASH v6.1.18 Released
14.05.2018
SIDACT at NAFEMS DACH 18, May 14-16, 2018- Bamberg, Germany
05.04.2018
Paraview Plugin for FEMZIP-CFD
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Jobs

Softwareentwickler CAE-Programme
Softwareentwicklung FEMZIP (Vollzeit)
Werksstudent
Softwareentwicklung FEMZIP
Werksstudent
Softwareentwicklung DIFFCRASH