抄録
A multiple objective optimization method is developed as one of the model update schemes in which the analysis model of the large-scale structures is improved to adjust the natural frequency to the experimental results. In this method, multiple natural frequency modes are the objective functions. This method has been developed to be applied to the large-scale structures. In this paper, it was applied to a grooved ring problem, in which not the ring sizes and the material constant but the known groove sizes (width, depth) were presumed as unknown design variables so that the calculation error of the natural frequency of six modes might be minimum. The errors of the estimated groove sizes were 2 to 8% of to the true value and it is confirmed that a suitable model update can be executed.
