Rotor critical speed calculation based on finite element method

In calculating the rotor system critical speed,the finite element method can ensure the integrity of the model and the accuracy of analysis,and allow the calculation of the complex rotor system critical speed.With the precision and speed problems of calculation in each dimensional finite element model,the advantages and disadvantages of 1D,2D and 3D finite element model was analyzed,the selection principle of each dimensional finite element model at different design and analysis stage was defined so as to meet the needs of the critical speed calculation,and verified with the calculation of turbine pump critical speed.The results show that 2D model has the advantages of 1D model and 3D model in normal condition,the computing speed is fast and solution is accurate;and has important reference value for rotor system critical speed calculation.