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. Ad...

One of the most promising fields of finite element model updating involves using data obtained from the modal response of a structure to update a finite element model. The University of Central Florida (UCF) has constructed a scale model of a two span bridge. Using an impact hammer and accelerometers mounted on the structure, the first 17 natural frequencies and mode shapes were identified. Usi...

In this paper, effects of changing ambient temperatures on finite element (FE) model updating of the Dowling Hall Footbridge are investigated. The Dowling Hall Footbridge is located on the Tufts University campus in Medford, Massachusetts. The footbridge is equipped with a continuous monitoring system that records vibration and temperature of the bridge once an hour or when triggered by large v...

Finite element analysts often have to perform analysis of perturbed models in order to validate the dimensioning through sensitivity analysis. This is also the case during Finite Element model updating process or for stochastic dynamic analysis where we want to obtain a statistical description of a solution, provided the statistical distributions of some design driving physical parameters. Thes...

The numerical results from a finite element (FE) model often differ from the experimental results of real structures. FE model updating is often required to identify and correct the uncertain parameters of FE model and is usually posed as an optimisation problem. Setting up of an objective function, selecting updating parameters and using robust optimisation algorithm are three crucial steps in...

Finite element model correction of quadratic eigenvalue problems (QEPs) using a symmetric eigenstructure assignment technique was proposed by Zimmerman and Widengren (Zimmerman, D., and Widengren, M., “Correcting Finite Element Models Using a Symmetric Eigenstructure Assignment Technique,” AIAA Journal, Vol. 28, No. 9, 1990, pp. 1670–1676) and incorporates the measured model data into the finit...