Experimental and Numerical Investigations of Vibration Characteristics Induced by Pressure Fluctuations in a Parallel Operating Pumping System
Publication: Journal of Hydraulic Engineering
Volume 147, Issue 7
Abstract
Parallel pumping systems may operate with excessive vibrations as a result of complex hydraulic excitation sources. To remove excessive vibrations, it is essential to understand the relationships between inner hydraulic excitations and outer vibration characteristics. In this investigation, experiments that included pressure and vibration measurements were performed in a parallel operating pumping system. A computational method was evaluated to determine its ability to reproduce the experimental results. The experimental results show that a large-amplitude vibration may occur under two specific conditions. One is when intrinsic single frequencies in pumps fall into the range of the broadband frequencies. The other is the beat phenomenon, which can occur if the blade passing frequencies (BPFs) from different pumps have a slight difference. The resonance condition is most likely satisfied on the floor slab of the pump house because the natural frequencies of the floor slab are relatively close to the BPF. The computational strategy is proven to be appropriate for resonance checks and risk assessment of high-level vibrations at the design stage.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors would like to acknowledge the financial support given by the National Natural Science Foundation of China (51879266 and 51839001), the National Key Research & Development Program of China (2017YFC0403206), and the Beijing Municipal Science and Technology Project (Z181100005518013).
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Published In
Journal of Hydraulic Engineering
Volume 147 • Issue 7 • July 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: May 12, 2020
Accepted: Feb 14, 2021
Published online: Apr 30, 2021
Published in print: Jul 1, 2021
Discussion open until: Sep 30, 2021
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