An efficient iterative updating method for hysteretic damping models

摘要

Finite element model updating techniques are used to update the finite element model of a structure in order to improve its correlation with the experimental dynamic test data. This paper presents an efficient iterative method for finite element matrix updating problem in a hysteretic damping model based on a few of complex measured vibration modal data. By using the proposed iterative method, the unique symmetric solution can be obtained within finite iteration steps in the absence of roundoff errors by choosing a special kind of initial matrix triple. Some theorems are stated and proved, numerical results show that the presented method can be used to update finite element models to get better agreement between analytical and experimental modal parameters.