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Gong Lenian (Southeast University Nanjing,210096 China)  
The relationship between actual me-chanical damping which can not be distinguished anddetermined and modal damping which is measurable inthe shaft torsional vibration of turbogenerator is ana-lyzed.The character,testing methods,testing resultsand laws in the change of modal damping is also ex-plained.A fundamental concept of modal damping andactual mechanical damping in shaft torsional vibrationof turbogenerator is discussed.
【CateGory Index】: TM311.014
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