November 2020

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Engineering Case Histories: Case 110: A checklist for vibration analysis

Periodically, I receive questions from engineers around the world on why a piece of critical machinery is vibrating excessively.

Sofronas, A., Consulting Engineer

Periodically, I receive questions from engineers around the world on why a piece of critical machinery is vibrating excessively. However, it is impossible to accurately diagnose problems when one is not in front of the machine system. Instead, I provide the following checklist of questions to help these engineers prepare for their investigation: Are you sure the vibration measurement is accurate and the measuring system is performing correctly? Are you sure the machine vibration is excessive? How do you know? Baseline data on what is normal vibration for the machine is always a useful tool. It is important to understand why specific vibration limits were selected. Do not use vibration li

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