EIGENVALUE REANALYSIS OF STRUCTURES USING PERTURBATIONS AND PADE APPROXIMATION

Based on the usual perturbation and Padé approximation, a new eigenvalue reanalysis method for modified structures is developed in this paper. By this method, the accuracy of the eigenvalues and varying ranges of the parameters of the structures are improved. As an application of the method, a numerical example is given and the second-order perturbation method and the proposed method are compared in the accuracy of eigenvalues and range of parameters. The results show that the present method is effective.