Multi-level curvature-based parametrization and model updating using a 3D full-field response

Model updating improves the correlation between response of real structure and finite-element (FE) model; however, selection parameters (parametrization) is crucial for its success. Using full-field modal shapes, a large number can be updated, e.g., Young’s moduli all finite elements; structural not necessarily sensitive to an arbitrary parameter, making optimization problem ill-conditioned. Additionally, computation full sensitivity matrix feasible relatively FE models. Not locations are equally important model updating; at highest mechanical loads, more focus required. In this research, based on curvature 3D experimental shape, where with high associated sensitivity. The assumption initially researched Euler–Bernoulli beam elements second-order tetrahedrons. proposed method investigated numerical experiments, successful was confirmed. With parametrization approach, geometrically complex parametrized updated without significant user input, generalizing model-updating procedure.