For mistuned blisk (integrally bladed disk)

a method for damping hard coating on blades was proposed to reduce vibration and improve its working life. However

the high fidelity model of mistuned blisk with hard coating tended to characterize massive computational scales in a finite element analysis

thus a method of double reduced-order modeling was developed to deal with this defect. Degrees of freedom of mistuned blisk with hard coating were reduced by using an improved hybrid interface sub-structural component modal synthesis (HISCMS) method

the modes of mistuned blisk with hard coating were reduced based on a criterion of intensive modes and a method of subset of nominal modes (SNM). In order to investigate vibration of mistuned blisk and the influence of hard coating on blisk

a mistuned blisk with NiCoCrAlY+YSZ (yttria-stabilized zirconia) hard coating on both sides of blades was selected as example to conduct simulation. Results revealed that the method of double reduced-order modeling can improve 25.86%－42.05% computational efficiency under the premise of the accuracy of calculation

the hard coating had strong damping effect

and resonant response of mistuned blisk in resonant areas can be suppressed remarkably.