Characteristic Design of Shaft System Vibration of Large Size Steam Turbine-Generator Unit

In order to improve the safe operation of steam turbinegenerator wnit,the characteristic desingn of shaft system vibration is the main way to reduce the vibration of unit. The paper introduces the researches on the critical speed,response of unbalance,response sentivity Q factor of resonant speed peak value and torsional vibration of large size steam turbinegenerator unit shaft system. The dynamic characteristic calculation of shaft system can make the shaft system of large size units to have good vibration characteriaties.