For a certain aeroengine blade disc-shaft system,a finite element model of the blade disc-shaft system with different distances between shaft and blade discs and different shaft diameters are established.Then the modal analysis is carried out and the natural frequency is calculated.The effects of the relative position of the shaft and the blade disc and the shaft diameter on the natural vibration of the blade disc-shaft system were analyzed.It provides a theoretical basis for the design of system tester in the future.The analysis results indicated that the vibration of the blade disc-shaft system includes three types of modes:blade vibration mode,blade shaft coupling mode and blade disk-shaft coupling mode.With the increase of the distance between the axis and the blade disk,the coupled natural frequency of the 1st order is relatively stable,while the coupled natural frequency of the 2nd order is on the rise.

Analysis of Natural Characteristics of Blisk Under Steady Temperature Field [J]. Journal of Shenyang University of Chemical Technology, 2023, 37(6): 524-528.