Review and Prospect for Coupled Lateral and Torsional Vibration of Turbogenerator Unit Shafting

The shafting for turbogenerator unit has become longer due to its capacity increase,meanwhile,rotor components may have inevitable mass eccentricity with increase of service time,that would bring apparent coupled lateral and torsional vibration of the turbogenerator shaft system.The dynamic characteristics of shafting can be investigated more exactly from the viewpoint of coupled lateral and torsional vibration.The previous study for coupled lateral and torsional vibration of tur- bogenerator rotor and shaft system is reviewed and purpose for further study is provided.It is significant for operation safety and failure diagnose of turbogenerator unit to carry out investigation on the coupled lateral and torsional vibration,and it may be effective to introduce advanced mechanics knowledge in further study.