Finite Element Model Updating Based on Direct Optimization Technique
Setting up of an objective function, update parameters and use of robust optimization algorithm are three crucial steps in FE model updating. In order to calculate the gradient of the objective function, analytic optimization algorithm is not easy to be achieved, while the direct optimization algorithm may achieve the objective function optimization simply by comparing the size of the objective function to move the iteration point. In this paper, the eigenvalues and mode shapes are used as the optimization objective function, the direct optimization algorithm is adopted, an updated finite element model is achieved, and a numerical example is given.
B. D. Ding et al., "Finite Element Model Updating Based on Direct Optimization Technique", Advanced Materials Research, Vols. 163-167, pp. 2804-2810, 2011