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Validation and Updating of FE Models for Structural Analysis

October 21-23, 2024

Seminar overview
October 21-23, 2024


Background Discussion & ABSTRACT

During this 3-Day FE Model Validation and Updating seminar, the participants will not only learn the basic principles of test-analysis correlation and finite element model updating, but also get hands-on experience using specialized software (FEMtools).

All aspects of a FE model validation process will be reviewed including the import and correlation of FEA and test models, the correlation of FEA/test data and results, the selection of model updating parameters, the definition of realistic targets, the computation of sensitivity coefficients, running of updating loops and post processing of  results.

Complementary technologies and applications such as probabilistic analysis, pretest planning, structural modifications, force identification and material characterization will also be discussed and applied. Approximately 50% on the time will be spent conducting hands-on laboratories.

Attendees are encouraged to bring a laptop computer with them for use during the laboratory exercises.  We will load a fully functional copy of FEMtools on the laptops which will operate for 30 days.  The software can be used to repeat the the laboratory exercises after the class or for the analysis of the attendees’ FEA/test data.

Day 1: 8:30 AM - 5:00 PM

  • Introduction
    • Discussion of processes and data flow
    • Needs, motivation and strategies for model validation
    • Managing model validation projects

  • Database Management & Finite Element Analysis
    •  Importing standard FEA and test data (model, shapes, FRF)
    • Using finite element analysis solvers (mass analysis, static analysis, modes analysis, FRF synthesis, forced response analysis) and piloting standard FEA software.
    • Examining the analytical and experimental database. Checking database integrity.
    • Database operations: coordinate system transformations, defining sets, mode shape normalization,…

  • Correlation Analysis
    • Mapping FE and test models (geometry correlation)
    • Expansion and truncation of mode shapes
    • Global and local shape correlation
    • Reduction of system matrices (Guyan, IRS, Craig-Bampton)
    • Mode shape orthogonality checking
    • FRF correlation 

  • Pretest Analysis
    • Overview of pretest analysis procedures
    • Selection of target modes
    • Selection of sensor locations; manual and automated procedures
    • Creation of test models

Day 2: 8:30AM - 5:00PM

  • Sensitivity Analysis and Model Updating
    • Selection of parameters and responses
    • Sensitivity analysis
    • Using mass information in model updating
    • Model updating using static test data
    • Modal-based model updating
    • FRF-based model updating
    • Parameter relations
    • Multi-model updating
    • Superelement-based model updating
    • Model updating using DOE/RSM

  • Probabilistic Model Validation & Updating
    • Overview and theoretical background
    • Data preparation and post-processing
    • Probabilistic model updating methods

Day 3: 8:30AM - 5:00PM

  • Applications of Model Updating
    • Material identification
    • Equivalent property identification
    • Structural damage identification

  • Structural Dynamics Modification
    • Overview and theoretical backgrounds
    • Definition of modification elements
    • Parameter slider and range controls
    • Applications of SDM in model updating

  • Force Identification and Updating
    • Overview and theoretical background
    • Data preparation
    • Nodal and pressure load identification

  • Script Development
    • Database management
    • Analysis integration and process automation
    • Mesh manipulation (refinement, coarsening, element type conversion, transformation,…)

  • Review and Closure
    • Review and summary
    • Ongoing research & development
    • Q&A
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