Computational model updating is a special ICS service to validate FE models. By updating multiple selected parameters of the model simultaneously a minimization of the test/analysis differences can be achieved.
Typical applications:
- Validation of FE models for subsequent analyses, e.g. for determination of flange loads via validated models as input for more detailed (static) models
- Investigation of modeling strategies, e.g. the validation of components and subsequent modeling of accessories/interfaceses
- Localization of critical model regions for remodeling
- Identification of unknown parameters, e.g. stiffnesses and damping of bearings/seals
- Tuning of reduced FE models to data obtained via fine FE models (discretization) to reduce of analysis times
Detailed information about the theory of computational model updating can be found here.
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ICS.sysval - FE model validation software
The ICS.sysval software developed at ICS is used for computational model updating. ICS.sysval is a software for test planning, test/analysis correlation and computational model updating. ICS.sysval operates under Mathworks MATLAB® (Version 7.5 or higher) and thus is platform independent! For computational model updating the FE-solvers MSC Nastran™ or Altair OptiStruct™ are utilized (sensitivity modules).
ICS.sysval provides the capabilities to optimally design vibration tests and to validate FE models utilizing the acquired test data.
The following modules are available:
- Test planning (optimal pick-up and exciter placement)
- Test/analysis correlation (MAC, COMAC)
- Visualization/animation
- Parameter localization and sensitivity analysis
- Computational model updating
At present interfaces exist for MSC Patran™, MSC Nastran™, and Altair OptiStruct™. Test data can be imported from standard Universal files.
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