In conventional torsional vibration simulation study by PSCAD/EMTDC

the simplified lumped massspring shaft model is adopted

but it is difficult to describe the torsional vibration characteristics of the shafting system and the detailed dynamic information of the shaft can hardly be obtained. In this paper

to remedy such a simulation

the multi-segment centralized mass model module of shafting is established in PSCAD simulation

which can more accurately simulate the torsional interaction oscillation of the machine network and obtain the local torsional stress response. In addition

the finite element model of coupling is built to analyze the torsional force of the bolts and screw hole. The results show that

correcting the S-N curves during the shafting system fatigue analysis can make the final fatigue damage assessment and calculation results more accurate.