Analysis of torsional vibration hazardous cross-section for turbo-generator shafting
Hazardous cross-section of turbo-generator shafting is the important research object of shafting torsional vibration safety analysis.Existing research mostly analyzes the hazardous cross-section by solving the inherent characteristics and fault response of the shafting torsional vibration,and the quick or comprehensive derivation of the hazardous cross-sections'locations can be challenging.Taking the shafting of a 600 MW turbo-generator as the research object,based on the parameters of the shafting model and the torsion calculation method of the circular shaft,the torsional vibration characteristics of each shaft segment of the shafting were calculated,and the torsional vibration hazardous cross-sections'locations of the set shafting were obtained.Then the torsional vibration resonance characteristics of the set shafting were simulated through finite element method,confirming the resonance hazardous cross-sections of the set shafting and validating the correctness of the theoretical calculation results.Research results show that:through theoretical calculation and simulation analysis of the set shafting,hazardous cross-sections of the shafting derived from torsional vibration characteristics are basically consistent,and torsional vibration hazardous cross-sections of the set shafting are located in the rotor journals and couplings.In the torsional vibration analysis,special attention should be paid to the torsional vibration response of the set shafting end with a small outside diameter.
万方数据
维普
