A Modular Modeling Method of Mistuned Blisk Based on State-Space Theory with Fitting Aerodynamic Excitation

•State-space method improves solving efficiency of lumped-parametric models of blisks•Traveling wake excitation is derived by aerodynamic load fitting of blade surface•The modular expression of three-blade blisk model can be extended to the multi-blade blisk model.•Dimensions of state space is two times of degrees of freedom for the blisk models•Stiffness mistuning is independent of the steady-state response of the tuned blade