This paper briefly describes the rotor dynamic analysis requirements in the API standards for process centrifugal compressors, induction motors and gearboxes. The paper also presents an example for each equipment type where the dynamic analysis performed by the manufacturer during the design stage in accordance with these standards identified critical aspects that were concerning to the purchase. The paper also highlights the measures taken to alleviate the purchaser's concerns, the vibration behavior of these machines after commissioning and some lessons learned from these cases.
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