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<p>The spectral composition of the low-frequency (&lt; 2 kHz) component of vibration acceleration signals from an unbalanced and a&#xa0;balanced gas turbine engine at different rotor rotation frequencies is considered. It is shown that the vibration signals of a&#xa0;gas turbine engine contain both stochastic and deterministic power components. At the same time, the spectrum of the vibration signal contains a&#xa0;number of basic deterministic components, the frequencies of which are not multiples of the main rotor frequency of the engine. The hidden periodicities of the first order in the signals are detected and analyzed using the approach of a&#xa0;periodically non-stationary random process. It is shown that engine balancing leads to a&#xa0;significant decrease in the total power of the deterministic components of the rotor main base frequency in the vibration signal. The power of the deterministic components, not multiple to the rotor basic frequency, does not decrease during balancing. Indicators for assessing the condition of balancing of gas turbine engines based on the analysis of the power of the deterministic components of the vibration signal are proposed.</p>

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The power estimation of the deterministic component of gas turbine engine vibration during balancing

  • 期刊论文

  • 发表日期：

    2026年7月21日

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  • R. M. Yuzefovych,
  • I. M. Javorskyj,
  • Yu. I. Torba,
  • Ye. V. Sbrodov,
  • O. V. Lychak,
  • B. R. Komarnytskyi

摘要

The spectral composition of the low-frequency (< 2 kHz) component of vibration acceleration signals from an unbalanced and a balanced gas turbine engine at different rotor rotation frequencies is considered. It is shown that the vibration signals of a gas turbine engine contain both stochastic and deterministic power components. At the same time, the spectrum of the vibration signal contains a number of basic deterministic components, the frequencies of which are not multiples of the main rotor frequency of the engine. The hidden periodicities of the first order in the signals are detected and analyzed using the approach of a periodically non-stationary random process. It is shown that engine balancing leads to a significant decrease in the total power of the deterministic components of the rotor main base frequency in the vibration signal. The power of the deterministic components, not multiple to the rotor basic frequency, does not decrease during balancing. Indicators for assessing the condition of balancing of gas turbine engines based on the analysis of the power of the deterministic components of the vibration signal are proposed.