CORRECTION OF FINITE-ELEMENT MODELS USING EXPERIMENTAL MODAL DATA

This paper presents a method to be used for correction of finite-element models by referring their modal parameters to experimental modal data. The proposed method is based upon both the sensitivity analysis and the least square method, and gives us the physically realistic solution of design variables, in contrast with the methods based on pseudo-inverse. Numerical simulations of finite-element models of a beam and a plate are presented to demonstrate the effectiveness and the validity of the proposed method in comparison with the pseudo-inverse method with respect to physical meaning of structures. Further, the correction of a finite-element model of an actual structure is carried out by referring its modal parameters to experimentally extracted modal data.