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Finite Element Model Updating from Physical Tests

30 Chapters
View Course Samples Online
01
Course overview
scope, objectives, and the role of model updating in structural dynamics and engineering validation.
objectivesupdating
02
Physical testing fundamentals for model updating
modal testing, frequency response functions, and measurement chain considerations.
Physicalupdating
03
Finite element model preparation
mesh quality, element types, boundary conditions, and modeling assumptions affecting updatability.
preparationboundary
04
Correlation metrics between test and analysis
MAC, FRAC, modal assurance criteria, and frequency response correlation.
Correlationanalysis
05
Sensitivity analysis
design variables, parameter selection, and ranking of updating parameters.
Sensitivityanalysis
06
Direct matrix updating methods
Baruch-Berman, optimal matrix update, and their practical limitations.
updatingBaruch-Berman
07
Modal property-based updating
eigenvalue and eigenvector residuals, least-squares formulations, and weighting strategies.
property-basedupdating
08
Frequency response function-based updating
FRF residual formulations, model correlation, and damping identification.
Frequencyresponse
09
Bayesian model updating
probabilistic framework, prior and posterior distributions, and uncertainty quantification.
Bayesianupdating
10
Optimization algorithms for model updating
gradient-based, genetic algorithms, and surrogate-assisted methods.
Optimizationalgorithms
11
Regularization techniques
Tikhonov regularization, L-curve, and handling ill-posed inverse problems.
Regularizationtechniques
12
Model class selection and validation
hypothesis testing, cross-validation, and avoiding overfitting.
selectionvalidation
13
Updating of boundary conditions and joints
stiffness, damping, and nonlinear interface characterization.
Updatingboundary
14
Material property identification
elastic moduli, density, and composite material parameter updating.
Materialproperty
15
Damping model updating
viscous, hysteretic, and modal damping estimation from test data.
updatinghysteretic
16
Case study
model updating of a laboratory-scale beam or plate structure using modal test data.
updatinglaboratory-scale
17
Case study
updating a complex built-up structure with bolted joints and local nonlinearities.
updatingbuilt-up
18
Case study
automotive body-in-white model updating using experimental modal analysis.
automotivebody-in-white
19
Case study
aerospace panel or satellite structure updating with high modal density.
aerospacesatellite
20
Case study
civil engineering structure updating using ambient vibration measurements.
structureupdating
21
Model updating for damage detection
stiffness reduction, crack modeling, and damage localization.
updatingdetection
22
Updating of nonlinear systems
equivalent linearization, nonlinear normal modes, and time-domain methods.
Updatingnonlinear
23
Treatment of measurement noise and uncertainties
error propagation, robust updating, and confidence intervals.
Treatmentmeasurement
24
Model reduction techniques for efficient updating
Craig-Bampton, component mode synthesis, and substructuring.
reductiontechniques
25
Experimental design for model updating
sensor placement, excitation selection, and data quality assessment.
Experimentalupdating
26
Software tools and implementation
MATLAB, Python, commercial FE codes, and interfacing with test data.
Softwareimplementation
27
Verification and validation of updated models
prediction accuracy, extrapolation, and validation metrics.
Verificationvalidation
28
Practical workflow for industrial model updating
from test planning to updated model delivery.
workflowindustrial
29
Advanced topics
digital twins, real-time updating, and integration with structural health monitoring.
Advancedreal-time
30
Course synthesis
best practices, common pitfalls, and future trends in finite element model updating.
synthesispractices