About possibilities of change
of a spectrum of eigenfrequency and vibratory stress rotor wheel of turbines
aviation gas-turbine engines
A.E. Zanin, A.P. Zinkovsky, A.V. Sheremetev
Results of the executed numerical researches by definition possibilities
tuning out from dangerous resonant fluctu-ations of
driving wheels of turbines aviation gas-turbine
engines at the expense of minor alterations of the geometrical sizes of
their making constructive elements are presented. Results of computing
experiments are compared to data strain-gage testing. There were formed new
blade and disc model of free turbine. There were offered the recommendations
for the mounting of transmitters. The calculation results were compared with
the experimental data. There was shown, that tuning out from dangerous
vibration frequency was conduct and there was obtained a good accordance
between calculations and strain-gage testing.
Key
words: gas-turbine engines, the turbine, the driving wheel,
blade row, cyclic symmetry, a spectrum of eigenfrequency,
resonant fluctuations.