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.

摘要：

根据模型修正理论，基于有限元模型模态分析结果与试验结果，采用二分法–PSO优化算法，进行模型修正。该方法提高了有限元模型修正的速度与精度，且避免了在PSO迭代寻优过程中陷入局部最优的问题。结果表明，采用基于二分法–PSO的模型修正方法得到的有限元模型的精度有了大幅度的提高，且更为准确地反映了试验模型的结构特征。将修正后的模型用于碰摩故障的研究，研究转速变化对转子碰摩动力学特性的影响，研究结果表明：仿真结果与试验结果一致性较高，为实际工程中转子系统的安全稳定运行提供一定的实际参考价值。

关键词: 振动与波, 转子碰摩, 有限元模型修正, 二分法-PSO