Vibration source recognition for pumping station plant house based on IESMD-PSE-EEI

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (9) : 45-56.

VIBRATION THEORY AND INTERDISCIPLINARY RESEARCH

Vibration source recognition for pumping station plant house based on IESMD-PSE-EEI

JIANG Qi1, WANG Jiankang2, ZHANG Jianwei*1, LIU Xizhu3, ZHAO Yu1,2

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Abstract

To address the challenge of accurately identifying vibration sources in pumping station buildings with multiple excitation sources and strong background noise interference, an improved Extreme-point Symmetric Mode Decomposition (IESMD)-power spectral entropy-energy entropy increment joint vibration source identification method was proposed. First, IESMD adaptive separation is carried out on the wavelet threshold noise reduction preprocessed signal, noise spectrum theory is introduced to determine the power spectrum entropy and energy entropy increment thresholds, and the Intrinsic Mode Function (IMF) is quantitatively screened to achieve accurate identification of vibration sources. The vibration source was identified based on the measured vibration data of five typical parts of the Dayuzhang Pumping Station powerhouse, and the vibration energy was introduced to calculate the energy proportion of each frequency division. The results showed that: This method can decompose multi-source signals into multiple effective frequency-modulated and amplitude-modulated components. The hydraulic excitation caused by Rotor-stator interaction (RSI) during operation is the dominant vibration source of the plant vibration. Its main frequency of vibration is 33.32Hz. The energy proportion at the pump seat, outlet bend and motor positions is as high as 84.54%, 98.53% and 97.15%, which is the main reason for the vibration of the pumping station plant.

Key words

vibration source identification / IESMD / PSE / energy entropy increment / contribution rate

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JIANG Qi1, WANG Jiankang2, ZHANG Jianwei1, LIU Xizhu3, ZHAO Yu1, 2. Vibration source recognition for pumping station plant house based on IESMD-PSE-EEI[J]. Journal of Vibration and Shock, 2025, 44(9): 45-56

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