Abstract: A method for operating a machine plant having a shaft train, including: a) determining the harmonic frequency of a torsional vibration mode of the shaft train and determining mechanical stresses arising during a vibration period of the torsional vibration mode; b) determining a correlation for each torsional vibration mode between a first stress amplitude, at a position of the shaft train that carries risk of stress damage, and a second stress amplitude, at a measurement location of the shaft train, using stresses determined for the respective torsional vibration mode; c) establishing a maximum first stress amplitude for the position; d) establishing a maximum second stress amplitude, corresponding to the maximum first stress amplitude, for the measurement location; e) measuring the stress of the shaft train while rotating; f) determining a stress amplitude at each harmonic frequency; g) emitting a signal when the stress amplitude reaches the maximum second stress amplitude.

Abstract: A coupling device for connecting a clutch to a turbine train, a turbine train having a clutch, and a method for connecting a clutch to a generator and to a turbine. The coupling device for connecting the clutch has a first coupling flange and a second coupling flange, wherein the first coupling flange and the second coupling flange each have at least one bore for accommodating a coupling bolt. The first coupling flange and the second coupling flange are centered in relation to each other by means of at least one coupling bolt, which is inserted into the bores in the first and in the second coupling flange.

Abstract: A method for operating a machine plant having a shaft train, including: a) determining the harmonic frequency of a torsional vibration mode of the shaft train and determining mechanical stresses arising during a vibration period of the torsional vibration mode; b) determining a correlation for each torsional vibration mode between a first stress amplitude, at a position of the shaft train that carries risk of stress damage, and a second stress amplitude, at a measurement location of the shaft train, using stresses determined for the respective torsional vibration mode; c) establishing a maximum first stress amplitude for the position; d) establishing a maximum second stress amplitude, corresponding to the maximum first stress amplitude, for the measurement location; e) measuring the stress of the shaft train while rotating; f) determining a stress amplitude at each harmonic frequency; g) emitting a signal when the stress amplitude reaches the maximum second stress amplitude.

Abstract: A coupling device for connecting a clutch to a turbine train, a turbine train having a clutch, and a method for connecting a clutch to a generator and to a turbine. The coupling device for connecting the clutch has a first coupling flange and a second coupling flange, wherein the first coupling flange and the second coupling flange each have at least one bore for accommodating a coupling bolt. The first coupling flange and the second coupling flange are centered in relation to each other by means of at least one coupling bolt, which is inserted into the bores in the first and in the second coupling flange.