METHOD FOR MEASURING SHAFTING MECHANICAL FATIGUE OF TURBINE GENERATOR SET

A method for measuring mechanical fatigue in shafts forming part of a turbine generator set, which involves determining a lumped mass model of a turbine generator set and its parameters; calculating a model frequency and a mode shape of the turbine generator set; acquiring an angular velocity change...

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Bibliographic Details
Main Authors ZHANG TAO, LIU QUAN, JIAO SHAOHUA, LI YUANSHENG, LIANG XINYAN
Format Patent
LanguageEnglish
Published 30.09.2010
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES
MEASURING
PHYSICS
TESTING
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Summary:A method for measuring mechanical fatigue in shafts forming part of a turbine generator set, which involves determining a lumped mass model of a turbine generator set and its parameters; calculating a model frequency and a mode shape of the turbine generator set; acquiring an angular velocity change at a machine end; calculating a torque at a calculating section of shafting based on the model frequency, a mode shape curve and an equivalent rigidity of the lumped mass model, so as to obtain a torque-time history curve at the calculating section of the shafting; calculating a fatigue damage accumulative value for a dangerous section of a set shafting under a certain malfunction or disturbance, that is, the shafting mechanical fatigue of the turbine generator set.
Bibliography:Application Number: US20080741509