One typical fusing structure (fused device or load reduction device, a variable supporting stiffness structure used in bearing supporting in aero-engine design) was introduced in this paper. Based on the rotor-bearing system simulation model, a dynamic calculation under the condition of variable supporting stiffness was conducted aimed at providing data for the rotor system safety design. Results showed that: rotor working in supercritical state had a benefit to the dynamic characteristics, as when the supporting stiffness suddenly lost, transient excessively increasing vibration was restrained, steady vibration also remained at a low level. Transient response peak value and impact response increased with the increase of stiffness loss, steady vibration ratio decreased with the increase of stiffness loss. Therefore, a compromise on the choosing of an optimal stiffness loss value was necessary. We also got some other significant conclusions that are instructive for further engineering applications.

This content is only available via PDF.
You do not currently have access to this content.