Vibration inspection of a gas turbine engine that did not pass acceptance tests due to increased vibration

Authors

  • Dvoryak Pavel Anatolievich Moscow Aviation Institute (National Research University) (MAI)
  • Katanov Maksim Andreevich Moscow Aviation Institute (National Research University) (MAI)
  • Ryzhenkov Valentin Mikhailovich Moscow Aviation Institute (National Research University)

Keywords:

vibrodiagnostics, modal testing, APU, experimental method, frequency of natural oscillations, dynamic characteristics

Abstract

The object of this study was the auxiliary power unit (APU) of a civil aircraft. The APU that came for repairs could not pass the acceptance tests. In this regard, it was decided to conduct its vibration examination to determine the dominant frequency which has the greatest impact on the overall level of vibration. The vibration examination was carried out by the impact method, and the spectrum was also evaluated during the operation of the product. As a result of the tests, the dominant frequency was determined. The frequencies of the natural vibrations of the unit’s rotor parts were also determined. The frequency of the natural vibrations of the coupling shaft of the rotor coincides with the frequency that appears in all the obtained spectra. Also, during a visual inspection of the coupling shaft, there were touches on the centering belts of the shafting

Author Biographies

Dvoryak Pavel Anatolievich, Moscow Aviation Institute (National Research University) (MAI)

postgrad. student at Department 205 “Technology of Aircraft Engine Production” of Moscow Aviation Institute. Diploma of a design engineer (Moscow Aviation Institute, 2021). He is preparing a thesis entitled “Technological methods for reducing the dynamicity and imbalance of aviation GTEs”.

Katanov Maksim Andreevich, Moscow Aviation Institute (National Research University) (MAI)

engineer at Department 205 “Technology of Aircraft Engine Production” of Moscow Aviation Institute. Diploma of a process engineer (Moscow Aviation Institute, 2021). He is preparing a thesis entitled “Effect of the surface layer quality of parts on the dynamic characteristic of gas turbine engine rotors”

Ryzhenkov Valentin Mikhailovich, Moscow Aviation Institute (National Research University)

Senior Researcher at Department 205 “Technology of Aircraft Engine Production” of Moscow Aviation Institute. Diploma of mechanical engineer (Moscow Aviation Institute, 1967). Candidate of Tech. Sci. in the balancing of rotors on gas bearings (Moscow Aviation Institute, 1978). Studies in the high-speed balancing of GTE rotors and vibrodiagnostics of airbreathing jet engines

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Published

2024-15-08

Issue

Vol. 28 No. 2(104) (2024)

Section

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