The parametric model of blisk was established based on the software of ANSYS.The blisk model with minimum mass and sufficient structure strength

along with stress criterion of the strength design for disk

was accomplished through optimization module of ANSYS.The vibration characteristics of blisk was analyzed

and the influence of the adjustment of disk parameters and blade profile parameters on the nature frequency of blisk were studied.On this basis

the structure design method of blisk considering avoidance of low order excitation was studied through the adjustment of different structural parameters

such as rim thickness

blade lean and blade profile thickness.According to the research statistics

the adjustment of disk parameters can increase the margin between the frequencies of low order coupled vibration and 4E excitation by 2.2% at the maximum rotation speed for the drum-constrained blisk

and the margin increase can be 8% by adjustment of blade profile parameters.The integration design method of blisk considering structure strength and resonant vibration avoidance is feasible

as the margin between the frequencies of 4E excitation and 1st vibration of the final blisk with the minimum mass is up to 10.8% with insulation from 5E excitation at the loss of 4.77% mass increase.