Abstract
In this paper, the development of a modal sensitivity analysis method is described for a system with repeated eigenvalues. It is shown that the new algorithm proposed by the authors has much better computational accuracy than the method proposed by S. H. Chen and H. H. Pan, and this method is simpler in terms of calculations than Ojalvo's and Dailey's methods, which was presented recently. The new method can also be extended to a coupled acoustic-structural system with repeated eigenvalues, and thus can be applied to vibration-noise reduction problems.
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