Abstract: A method of mistuning identification for integrally bladed disk is presented in this article. The analytical modes obtained by the finite element model of a tuned bladed disk and the measured steady-state responses of the actual mistuned bladed disk are used as the basic information. The identification method is based on the subset of nominal modes (SNM) reduced technique, which greatly lowers the computational cost and information requirement of the identification procedure. The submatrix method enables a more free definition of mistuning parameters and allows this identification method to perform the function of model modification. The forced response experimental data is used for identification without requiring the knowledge of the applied forces. This makes the basic data more reliable and reduces measurement difficulty. Finally, numerical simulation of an integrally bladed disk is preformed to validate the effectiveness of the identification method.

Key words: dynamics, integrally bladed disk, mistuning, identification, reduced technique, submatrix method, steady-state response