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Failure analysis of a cooling pump using modal and vibration analysis...

by Thomas J Hazelwood, Blake W Van Hoy
Publication Type
Journal Name
International Journal of Condition Monitoring and Diagnostic Engineering Management (COMADEM)
Publication Date
Page Numbers
11 to 15

Four pumps redundantly supply cooling water to a system. All four pumps underwent maintenance during a recently scheduled downtime. During preliminary evaluation following maintenance, one pump, the subject of this document, exhibited higher vibration levels compared to the other three pumps. The pump underwent further performance testing to rule out potential damage resulting from the higher vibration. Vibration analysis and modal analysis including steady state spectrum, operational deflection shape, run up transients, and modal impact have been utilized to identify dynamic characteristics that could contribute to the increased vibration levels. This document will cover the testing setup, methodology, analysis results, and recommendations.