多跨转子系统不平衡动力学匹配

以某大型压缩机低压端大齿轮、汽轮机、中压缸转子和低压缸转子组成的四跨轴系转子系统为研究对象，采用有限元法建立系统动力学模型；并通过两种优化方法分别实现对整个多跨转子系统不平衡动力学匹配.经过匹配后的不平衡质量和相位等动力学参数达到了两种较好的组合，分别适用于不同的匹配条件，降低了整个系统的不平衡响应即振动量，有效地提升了系统的动力学性能和抗不平衡故障的免疫力.同时验证了动力学匹配技术对整体多跨转子系统的可行性.

Unbalance Dynamic Matching of Multi-span Rotor System

Taking a four-span shaft rotor system that composes of big gear, turbine, medium-pressure and low-pressure cylinder rotor at the low pressure side of a large compressor as the research object, FEM was used to establish the system dynamic model and unbalance dynamic matching of the whole system was implemented via two kinds of optimization method. The simulation results showed that parameters such as unbalance mass and phase have achieved two good combinations, which are suitable for different matching conditions. The unbalance response namely the vibration of the whole system was reduced. Dynamic performance and resistance of unbalance fault were enhanced effectively. Feasibility of the dynamic matching technology applied to the whole multi-span rotor system is verified.