Re-Analysis Techniques in Structural Dynamics

The aim of the reanalysis is determining of the structural response of modified systems using the pertinent results from a reference structure so reducing the computational effort. Repeated analyses of the response of a structure under certain or uncertain loads are often necessary in various fields of applications. Optimization techniques, model updating, design process, Monte Carlo simulations of structure with uncertain parameters are some examples in which several analyses of slightly modified systems occurs. In order to reduce the computational effort in determining both the static and the dynamic response, various reanalysis techniques have been proposed in literature. In this paper the most recently proposed dynamic reanalysis techniques are scrutinized. Furthermore, a recently proposed reanalysis technique for both deterministic and stochastic load is herein presented. Remarkably, the numerical results reveal that the reanalysis techniques represent a new strategy in determining the dynamic response of structures with uncertain parameters via a Monte Carlo simulation.