Dynamic Analysis of a Pumping Station with Coupling Misalignment Fault

Ahmed Ghorbel, Oussama Graja, Moez Abdennadher, Lassâad Walha, Mohamed Haddar

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Misalignment fault is a common source that generates strong vibrations and even dysfunction in rotating machinery. However, the characteristics of the dynamic response and the modeling of this type of defect have not been fully understood and there remains today an attractive field of research. This paper sheds the light on the modeling of vibrations and the diagnosis of coupling misalignment in a water pumping station for a dam case. Firstly, the paper presents a detailed dynamic model of a pump station using lumped elements. The model includes the motor, pump and two elastic couplings. These components are connected by shafts supported by bearings. Secondly, an approach to modeling an alignment defect, specifically parallel misalignment has been developed and presented. Thirdly, motion equations of the model were formulated and solved using Newmark' method. Finally, simulated results are presented and discussed using temporal and spectrum analysis. In parallel misalignment, it is found that multi-frequency components are obvious, static components are shown in the dynamic response. 2x rotational frequency of the motor will appear and is dominated and 1x rotational frequency is weak in the spectrum. The vibration responses of the three supporting bearing according to the radial directions with misalignment defect are investigated.

Original languageEnglish
Title of host publicationAdvances in Acoustics and Vibration III
Subtitle of host publicationProceedings of the Third International Conference on Acoustics and Vibration (ICAV2021), March 15-16, 2021
EditorsNabih Feki, Mohamed Slim Abbes, Mohamed Taktak, Mohamed Amine Ben Souf, Fakher Chaari, Mohamed Haddar
PublisherSpringer, Cham
Number of pages8
ISBN (Electronic)9783030765170
ISBN (Print)9783030765163
Publication statusPublished - 30 May 2021
Externally publishedYes
Event3rd International Conference on Acoustics and Vibration - Online
Duration: 15 Mar 202116 Mar 2021
Conference number: 3

Publication series

NameApplied Condition Monitoring
PublisherSpringer Cham
VolumeACM 17
ISSN (Print)2363-698X
ISSN (Electronic)2363-6998


Conference3rd International Conference on Acoustics and Vibration
Abbreviated titleICAV 2021

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