DETECTING STRUCTURAL CHANGES WITH THE ONE-STEP FE MODEL UPDATING TECHNIQUE

Description

Differently from the sensitivity based finite element (FE) model updating technique in which the discrepancies between the FE and experimental modal properties are reduced iteratively by modifying the FE modelling assumptions, the one-step FE model updating technique based on modal orthogonality and
the local correspondence (LC) principle updates the FE model in a single step. When updating an FE model with the one-step updating approach, it is assumed that the discrepancies between a FE model and the (physical) modelled structure are small and distributed over the model’s degrees of freedom. If this assumption is fulfilled, it is verified that the one-step method efficiently updates the FE model, so that its modal properties match very well the ones obtained from experimental vibration tests. In this paper, the performance of the one-step updating technique in detecting localized changes is investigated
by means of a practical application example in which the experimental modal properties of a t-shaped steel structure are used to update the corresponding FE model.

Period	13 May 2019 → 15 May 2019
Event title	8th International Operational Modal Analysis Conference
Event type	Conference
Conference number	8
Location	Copenhagen, DenmarkShow on map
Degree of Recognition	International