关键词: 振动与波, 转子碰摩, 有限元模型修正, 二分法-PSO

Abstract:

Rotor rubbing FE model updating method based on DPSO (Particle swarm optimization algorithm based on dichotomy) model updating theory and modal test was proposed to improve the precision of a flexible shaft of the rigid-flexible coupled rotor rub-impact model dynamic simulation. According to the model updating theory, based on the FE model analysis results and experimental results, and the DPSO method is adopted as the optimization algorithm for model updating. It improves the speed and accuracy of the finite element model updating and avoids getting into the local optimal solution in the iterative optimization of PSO. Research indicates that the accuracy of the model obtained by this method has been greatly improved, and the structure characteristic of the rotor has been more accurately reflected. The updated model is applied to the research of rubbing fault, and the influence of speed variation on the dynamic characteristics of rotor rubbing is considered. The experimental results show that the simulation results are in good agreement with the experimental results, which is a safe and stable operation of the rotor system in practical engineering. The results show that the simulation results are in good agreement with the experimental results. Provide some practical reference value.