20.500.12556/RUL-142702 Multi-level curvature-based parametrization and model updating using a 3D full-field response 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. FE model updating interior point method curvature-based parametrization frequency-domain triangulation modelno posodabljanje metoda notranje točke parametrizacija ukrivljenosti triangulacija v frekvenčni domeni true false true Angleški jezik Slovenski jezik Članek v reviji 2022-11-21 08:19:10 2022-11-21 08:19:16 2023-01-21 03:45:36 0000-00-00 00:00:00 2023 0 0 15 str. Vol. 187, art. 109927 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 535:004.9(045) 0888-3270 10.1016/j.ymssp.2022.109927 130115331 1-s2.0-S0888327022009955-main.pdf 1-s2.0-S0888327022009955-main.pdf 1 7A9C22EA4171553C52DFC079B1417E9E a4f26ab2c4a2b8620b1733d7912057b1304c37c8e6e0ced478a42e221533b2f0 e4fdfd1f-98ba-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=165994 https://www.sciencedirect.com/science/article/pii/S0888327022009955 1 af078e61-696c-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=164156 Fakulteta za strojništvo 0 0 0