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Multi-level curvature-based parametrization and model updating using a 3D full-field responseZaletelj, Klemen, inženir strojništva ...Model updating improves the correlation between the response of the real structure and the response of the finite-element (FE) model; however, the selection of the updating parameters ... (parametrization) is crucial for its success. Using full-field modal shapes, a large number of parameters can be updated, e.g., the Young’s moduli of all the finite elements; however, the structural response is not necessarily sensitive to an arbitrary parameter, making the optimization problem ill-conditioned. Additionally, the computation of the full sensitivity matrix is not feasible for relatively large FE models. Not all locations are equally important for model updating; at locations of the highest mechanical loads, more focus is required. In this research, the updating parameters are based on the curvature of the 3D full-field experimental shape, where locations with high curvature are associated with high sensitivity. The assumption is initially researched with the Euler–Bernoulli beam elements and second-order tetrahedrons. The proposed method is investigated on numerical and real experiments, where successful updating was confirmed. With the proposed parametrization and updating approach, a geometrically complex structure is parametrized and the parameters updated without significant user input, generalizing the model-updating procedure.Source: Mechanical systems and signal processing. - ISSN 0888-3270 (Vol. 187, 2023, str. 1-15)Type of material - article, component part ; adult, seriousPublish date - 2023Language - englishCOBISS.SI-ID - 130115331
Author
Zaletelj, Klemen, inženir strojništva |
Gorjup, Domen, 1992- |
Slavič, Janko, 1978- |
Boltežar, Miha
Topics
FE model updating |
interior point method |
curvature-based parametrization |
frequency-domain triangulation |
modelno posodabljanje |
metoda notranje točke |
parametrizacija ukrivljenosti |
triangulacija v frekvenčni domeni
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Zaletelj, Klemen, inženir strojništva | 51176 |
Gorjup, Domen, 1992- | 39358 |
Slavič, Janko, 1978- | 23010 |
Boltežar, Miha | 02034 |
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