Operational modal analysis on a pump operating at varying speeds: an industrial history case

• Published in: Mechanics & industry : an international journal on mechanical sciences and engineering applications Vol. 17; no. 1; p. 101
• Main Authors: Viet-Hung, Vu, Bechir, Badri, Marc, Thomas, Pierre, Jean
• Format: Journal Article
• Language: English
• Published: Villeurbanne EDP Sciences 2016
• Subjects: Component reliability; Damping ratio; Diagnosis; Hydraulic pump; Modal analysis; operational modal analysis; Regression analysis; Reliability analysis; Resonant frequencies; Rotation; short-time autoregressive; Vibration; Vibration analysis; vibration diagnosis; Vibration measurement; Vibration monitoring; Water treatment
• ISSN: 2257-7777; 2257-7750
• DOI: 10.1051/meca/2015043

Industrial hydraulic pumps are complex structures on which vibrations can be harmful for reliability, fatigue of components and productivity. The application of vibration analysis and diagnosis on a huge water treatment pump at the City of Montreal’s facility is presented in this paper. By using a Short Time Auto-Regressive (STAR) method combined with a modal test, it is seen that the dynamic properties and behavior of the pump included both rotating and fixed structures can be evaluated from the experimental analysis on the vibration measurement signal during its normal working condition. Natural frequencies, damping ratios and rotating speed can be clearly identified and monitored. It is shown that the analysis and diagnosis from operational vibration measurement is a very effective technique for the assessment of the huge machines in real working condition.